Cant cook ( pack )any big project

Hello.
I am new in creating something with ue4 but still have some expirience for 1 year+
Moustly i try to worck with blueprints to make a kind of first person shooter.
But not so far i faced with strange problem. when i try to package my project it does not packing at all writing me that cooking failed. It is interesting that i tried version 4.24 4.25 4 .26 all is the same. Happens this when i take too much for engine content.

So if i create new project with first pers character and and just few assets well it worcks some how and i can package it.
But if i add more ( moustly 15 + like for 30GB content) then i cant cook it at all, always fails. I spend 2 days to add 1 by 1, to try other assets. to reinstal engine to try other engine. reboot pc over 20 times . many new projects. i read what other ppl wrote and switched off antivirus and many other things. enterred all levels that i had and pressed save and build if necessary. enterred all char BP and anim BP to save all inside eventhow all was ok . Nothing. It like has a kind of warning limit. if warning limit is more then aproximative 500, then cooking fails.

I dont understand how it worcks and how can cooking be failed if you take new project , new assets, you dont change anything, nothing at all , dont put anything on level and still cooking failed. what is the logic?

hope for your help because i already have no ideya how to fix this.

down you can download more info about fail and see what i downloaded to my test project

UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: Cook Profile
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: ============
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0.CookWallTimeSec=472.489911
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 0.StartupWallTimeSec=11.638235
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1.CookByTheBookTimeSec=460.811991
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 0.StartCookByTheBookTimeSec=5.093008
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 0. 0.GameCookModificationDelegateTimeSec=0.000482
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 1.TickCookOnTheSideTimeSec=450.376439
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 1. 0.TickCookOnTheSideLoadPackagesTimeSec=118.298193
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 1. 1.TickCookOnTheSideSaveCookedPackageTimeSec=226.668571
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 1. 1. 0.TickCookOnTheSideResolveRedirectorsTimeSec=0.000000
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 1. 2.TickCookOnTheSideBeginPackageCacheForCookedPlatformDataTimeSec=35.256855
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 1. 3.TickCookOnTheSideFinishPackageCacheForCookedPlatformDataTimeSec=0.000000
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 2.TickLoopGCTimeSec=0.000000
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 3.TickLoopRecompileShaderRequestsTimeSec=0.368949
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 4.TickLoopShaderProcessAsyncResultsTimeSec=0.263370
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 5.TickLoopProcessDeferredCommandsTimeSec=0.167059
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:  0. 1. 6.TickLoopTickCommandletStatsTimeSec=0.031806
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: DDC Summary Stats
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: =================
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: TotalGetHits    =     62098
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: TotalGets       =     62762
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: TotalGetHitPct  =  0.989420
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: LocalGetHitPct  =  0.955196
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: SharedGetHitPct =  0.000000
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: OtherGetHitPct  =  0.034225
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: GetMissPct      =  0.010580
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: TotalPutHits    =      1433
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: TotalPuts       =      1433
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: TotalPutHitPct  =  1.000000
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: PutMissPct      =  0.000000
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display:
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: DDC Resource Stats
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: =======================================================================================================
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: Asset Type                          Total Time (Sec)  GameThread Time (Sec)  Assets Built  MB Processed
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: ----------------------------------  ----------------  ---------------------  ------------  ------------
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: Texture (Streaming)                           153.99                   0.00             0      26422.01
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: MaterialShader                                 17.06                  17.06            61        468.66
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: AnimSequence                                   10.25                  10.25             0        321.27
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: SoundWave                                       4.43                   4.43             0        134.02
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: Audio (Inline)                                  3.72                   3.72           362         11.41
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: SkeletalMesh                                    3.58                   3.58             3        653.80
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: StaticMesh                                      2.64                   2.64            25        136.64
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: LandscapeCollision (Heightfield)                2.62                   2.62             0        508.18
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: PhysX (BodySetup)                               1.86                   1.86            23         65.05
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: NavCollision                                    0.89                   0.89            25          3.29
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: SubUVAnimation                                  0.10                   0.10             0          0.78
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: Texture (Inline)                                0.03                   0.03           144       1498.04
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: GlobalShader                                    0.01                   0.01             0          6.56
UATHelper: Packaging (Windows (64-bit)):   LogCookCommandlet: Display: DistanceField                                   0.00                   0.00             0          0.00
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display:
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: Warning/Error Summary (Unique only)
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: -----------------------------------
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Error: DoesPackageExist: DoesPackageExist FAILED: 'None' is not a standard unreal filename or a long path name. Reason: Path should start with a '/'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "JW_FlameDungeon.FX.SM_FogPlane02" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Please consider resaving package in order to speed-up loading.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "JW_FlameDungeon.FX.SM_FX_Embers" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "JW_FlameDungeon.FX.SM_FogPlane02" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "JW_FlameDungeon.FX.SM_FX_Embers" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "StaticMesh'FX_Meshes_IB.SM_Debris_Box_RadialFull'" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "JW_Ice_Mountain.Mesh.SM_SnowBoulder" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "FX_Meshes.UI.SM_SelectionMesh_01" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "JW_Ice_Mountain.Mesh.SM_SnowBoulder" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "FX_Meshes.UI.SM_SelectionMesh_01" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "StaticMesh'FX_Meshes_IB.SM_Debris_Box_RadialFull'" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "'FX_Ambient.Meshes.SM_Bats'" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "CastleEffects.TouchToMoveArrow" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "StaticMesh'FX_Meshes.Fire.SM_Dungeon_Pipes_Lava01_Cool'" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "m_FogSheet_02" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "FX_Test_LAN.Meshes.SM_IceWall01" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "CastleEffects.TouchToMoveArrow" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "'FX_Ambient.Meshes.SM_Bats'" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "FX_Test_LAN.Meshes.SM_IceWall01" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "StaticMesh'FX_Meshes.Fire.SM_Dungeon_Pipes_Lava01_Cool'" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "S_Survival_CA_Chicken_02.SM.S_Survival_CA_Chicken_02" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "Env_ALL_Artifacts.Mesh.Env_ALL_Terminus001" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "Env_ALL_Artifacts.Mesh.Env_ALL_Terminus001" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "S_ClothTarps_03.SM.Mesh.S_ClothTarps_03" is in short form, which is unsupported and -- even if valid -- resolving it will be really slow.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogPackageName: Warning: Asset path "S_ClothTarps_03.SM.Mesh.S_ClothTarps_03" could not be resolved.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogAssetRegistry: Warning: [AssetLog] C:\Users\clemo\Documents\Unreal Projects\G1\Content\ParagonKhaimera\Characters\Maps\Lighting_Background.umap: Package has invalid export /Game/ParagonKhaimera/Characters/Maps/Lighting_Background_BuiltData.Lighting_Background_BuiltData, resave source package!
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogAssetRegistry: Warning: [AssetLog] C:\Users\clemo\Documents\Unreal Projects\G1\Content\ParagonRampage\Characters\Maps\Lighting_Background.umap: Package has invalid export /Game/ParagonRampage/Characters/Maps/Lighting_Background_BuiltData.Lighting_Background_BuiltData, resave source package!
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogCook: Warning: Unable to find package for cooking /Game/ParagonTwinblast/TwinBast
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogCook: Warning: Unable to find package for cooking /Game/SpringLandscape/Materials/Functions/F_Blender
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogCook: Warning: Unable to find package for cooking /Game/ParagonTwinblast/Characters/Heroes/TwinBlast/Animations/AimOffsets/Idle_AO_Yaw
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogReflectionCaptureComponent: Warning: /Game/QuadrapedCreatures/MountainDragon/Maps/Overview contains a legacy UReflectionCaptureComponent and is being non-deterministically cooked - please resave the asset and recook.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogReflectionCaptureComponent: Warning: /Game/QuadrapedCreatures/Griffon/Maps/Overview contains a legacy UReflectionCaptureComponent and is being non-deterministically cooked - please resave the asset and recook.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogReflectionCaptureComponent: Warning: /Game/QuadrapedCreatures/Centaur/Maps/Overview contains a legacy UReflectionCaptureComponent and is being non-deterministically cooked - please resave the asset and recook.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogReflectionCaptureComponent: Warning: /Game/QuadrapedCreatures/Barghest/Maps/Overview contains a legacy UReflectionCaptureComponent and is being non-deterministically cooked - please resave the asset and recook.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogScript: Warning: Script Msg: Divide by zero detected: 0.000000 / 0
UATHelper: Packaging (Windows (64-bit)):   Script call stack:
UATHelper: Packaging (Windows (64-bit)):       Function /Game/ParagonWraith/Characters/Heroes/Wraith/Wraith_AnimBlueprint.Wraith_AnimBlueprint_C:BlueprintUpdateAnimation
UATHelper: Packaging (Windows (64-bit)):       Function /Game/ParagonWraith/Characters/Heroes/Wraith/Wraith_AnimBlueprint.Wraith_AnimBlueprint_C:ExecuteUbergraph_Wraith_AnimBlueprint
UATHelper: Packaging (Windows (64-bit)):   
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogSpawn: Warning: Streaming level uses short package name (None). Level will not be loaded.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogUObjectHash: Warning: Ambiguous path search, could be Package /Game/ParagonSevarog/Characters/Maps/Lighting_Background_BuiltData or Package /Game/ParagonSevarog/Characters/Maps/Lighting_Background./Game/ParagonSevarog/Characters/Maps/Lighting_Background_BuiltData
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogUObjectGlobals: Warning: [AssetLog] C:\Users\clemo\Documents\Unreal Projects\G1\Content\ParagonGRIMexe\Characters\Heroes\GRIM\Animations\LevelStart_Montage.uasset: Failed to load '/Game/ParagonShinbi/Characters/Heroes/Shinbi/Animations/LevelStart': Can't find file.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogBlueprint: Warning: [AssetLog] C:\Users\clemo\Documents\Unreal Projects\G1\Content\FXVarietyPack\EpicContent\Blueprints\BP_DemoRoom.uasset: [Compiler] Set Text (String) : Usage of 'Set Text (String)' has been deprecated. Use the SetText function taking an FText instead.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogBlueprint: Warning: [AssetLog] C:\Users\clemo\Documents\Unreal Projects\G1\Content\FXVarietyPack\EpicContent\Blueprints\BP_DemoDisplay.uasset: [Compiler] Set Text (String) : Usage of 'Set Text (String)' has been deprecated. Use the SetText function taking an FText instead.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoRoom_Enum::Standard' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoRoom_Enum::RoofwithHole' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoRoom_Enum::RoofOpen' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoRoom_Enum::BP_DemoRoom_MAX' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoRoom_Enum.BP_DemoRoom_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogBlueprint: Warning: [AssetLog] C:\Users\clemo\Documents\Unreal Projects\G1\Content\AdvancedMagicFX13\DemoRoomData\Blueprints\BP_DemoRoom.uasset: [Compiler] Set Text (String) : Usage of 'Set Text (String)' has been deprecated. Use the SetText function taking an FText instead.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoDisplay_Enum::ROund' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoDisplay_Enum::SquareL' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoDisplay_Enum::RoomL' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoDisplay_Enum::DescriptionOnly' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogEnum: Warning: Enum name collision: 'BP_DemoDisplay_Enum::NewEnumerator0' is in both '/Game/AdvancedMagicFX13/DemoRoomData/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum' and '/Game/FXVarietyPack/EpicContent/Blueprints/BP_DemoDisplay_Enum.BP_DemoDisplay_Enum'
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: NOTE: Only first 50 warnings displayed.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display:
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: Failure - 1 error(s), 544 warning(s)
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display:
UATHelper: Packaging (Windows (64-bit)):   
UATHelper: Packaging (Windows (64-bit)):   Execution of commandlet took:  460.91 seconds
UATHelper: Packaging (Windows (64-bit)):   LogHttp: Display: cleaning up 0 outstanding Http requests.
UATHelper: Packaging (Windows (64-bit)):   LogContentStreaming: Display: There are 1 unreleased StreamingManagers
UATHelper: Packaging (Windows (64-bit)): Took 488,1824442s to run UE4Editor-Cmd.exe, ExitCode=1
UATHelper: Packaging (Windows (64-bit)): ERROR: Cook failed.
UATHelper: Packaging (Windows (64-bit)):        (see C:\Users\clemo\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.26\Log.txt for full exception trace)
UATHelper: Packaging (Windows (64-bit)): AutomationTool exiting with ExitCode=25 (Error_UnknownCookFailure)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults: Error: Unknown Cook Failure

sorry it does not allow me to upload txt or word files.