i have this issue can anyone help me?

[GOLD_KNIGHT_GR]

UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineIntegral
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineIntegral.TilingAALineIntegral
UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineIntegral
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineIntegral
UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineBoxFiltered
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineBoxFiltered.TilingAALineBoxFiltered
UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineBoxFiltered
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineBoxFiltered
UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAAGrid
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAAGrid.TilingAAGrid
UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAAGrid
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAAGrid
UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Sprite/M_BrushSprite_01
UATHelper: Packaging (Windows): Target package: /Engine/EditorResources/S_Terrain
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorResources/S_Terrain.S_Terrain
UATHelper: Packaging (Windows): LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Sprite/M_BrushSprite_01
UATHelper: Packaging (Windows): Target package: /Engine/EditorResources/S_Terrain
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorResources/S_Terrain
UATHelper: Packaging (Windows): LogSavePackage: Display: Took 0.000709s to verify the EDL loading graph.
UATHelper: Packaging (Windows): LogInit: Display:
UATHelper: Packaging (Windows): LogInit: Display: Warning/Error Summary (Unique only)
UATHelper: Packaging (Windows): LogInit: Display: -----------------------------------
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineIntegral
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineIntegral.TilingAALineIntegral
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineIntegral
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineIntegral
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineBoxFiltered
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineBoxFiltered.TilingAALineBoxFiltered
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAALineBoxFiltered
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAALineBoxFiltered
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAAGrid
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAAGrid.TilingAAGrid
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Internal/BrushBounds
UATHelper: Packaging (Windows): Target package: /Engine/EditorMaterials/TilingAAGrid
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorMaterials/TilingAAGrid
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
PackagingResults: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Sprite/M_BrushSprite_01
UATHelper: Packaging (Windows): Target package: /Engine/EditorResources/S_Terrain
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorResources/S_Terrain.S_Terrain
UATHelper: Packaging (Windows): LogInit: Display: LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
UATHelper: Packaging (Windows): Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Sprite/M_BrushSprite_01
UATHelper: Packaging (Windows): Target package: /Engine/EditorResources/S_Terrain
UATHelper: Packaging (Windows): Referenced object: /Engine/EditorResources/S_Terrain
UATHelper: Packaging (Windows): LogInit: Display:
UATHelper: Packaging (Windows): LogInit: Display: Failure - 8 error(s), 0 warning(s)
UATHelper: Packaging (Windows): LogInit: Display:
UATHelper: Packaging (Windows): Execution of commandlet took: 8.12 seconds
UATHelper: Packaging (Windows): Took 14,90s to run UnrealEditor-Cmd.exe, ExitCode=1
UATHelper: Packaging (Windows): Cook failed.
UATHelper: Packaging (Windows): (see C:\Users\vasilis\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_5.6\Log.txt for full exception trace)
UATHelper: Packaging (Windows): AutomationTool executed for 0h 0m 38s
UATHelper: Packaging (Windows): AutomationTool exiting with ExitCode=25 (Error_UnknownCookFailure)
UATHelper: Packaging (Windows): BUILD FAILED
PackagingResults: Error: Unknown Cook Failure