Hey Frozenfire,
Here are the errors and warnings I found within your project. Please correct all of the errors and as many warnings as possible and then try again. If you run into another complication, please upload those as well.
UE4Editor-Cmd: [2015.12.19-04.15.19:601][ 0]LogInit:Display: Warning/Error Summary
UE4Editor-Cmd: [2015.12.19-04.15.19:601][ 0]LogInit:Display: ---------------------
UE4Editor-Cmd: [2015.12.19-04.15.19:601][ 0]LogInit:Display: LogLinker:Warning: CreateExport: Failed to load Parent for Function /Game/PC_Blueprints/Weapons/Trails/ProjectileTrails_Grenade.ProjectileTrails_Grenade_C:UserConstructionScript; removing parent information, but keeping function
UE4Editor-Cmd: [2015.12.19-04.15.19:602][ 0]LogInit:Display: LogLinker:Warning: CreateExport: Failed to load Parent for Function /Game/PC_Blueprints/Weapons/Projectile/Projectile_GrenadeLauncher.Projectile_GrenadeLauncher_C:UserConstructionScript; removing parent information, but keeping function
UE4Editor-Cmd: [2015.12.19-04.15.19:603][ 0]LogInit:Display: LogLinker:Warning: CreateExport: Failed to load Parent for Function /Game/PC_Blueprints/Weapons/Trails/ProjectileTrails_SATMRocket.ProjectileTrails_SATMRocket_C:UserConstructionScript; removing parent information, but keeping function
UE4Editor-Cmd: [2015.12.19-04.15.19:604][ 0]LogInit:Display: LogLinker:Warning: CreateExport: Failed to load Parent for Function /Game/PC_Blueprints/Weapons/Projectile/Projectile_ATRocket.Projectile_ATRocket_C:UserConstructionScript; removing parent information, but keeping function
UE4Editor-Cmd: [2015.12.19-04.15.19:605][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning Can't connect pins Target and GSF RTSPanel : Master Widget RTSPanel Reference is not compatible with GSF RTSPanel Reference.
UE4Editor-Cmd: [2015.12.19-04.15.19:606][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning Can't connect pins GSF RTSPanel and Target : GSF RTSPanel Reference is not compatible with Master Widget RTSPanel Reference.
UE4Editor-Cmd: [2015.12.19-04.15.19:607][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0025.18] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 2 Warning(s) [in 25 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:607][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0025.18] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 3 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:608][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0025.18] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 4 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:609][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning Can't connect pins Target and GSF RTSPanel : Master Widget RTSPanel Reference is not compatible with GSF RTSPanel Reference.
UE4Editor-Cmd: [2015.12.19-04.15.19:610][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning Can't connect pins GSF RTSPanel and Target : GSF RTSPanel Reference is not compatible with Master Widget RTSPanel Reference.
UE4Editor-Cmd: [2015.12.19-04.15.19:610][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0025.23] Compile of GSF_RTSPanelButtonWidget successful, but with 2 Warning(s) [in 16 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:611][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0025.23] Compile of GSF_RTSPanelButtonWidget successful, but with 3 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:612][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0025.23] Compile of GSF_RTSPanelButtonWidget successful, but with 4 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:612][ 0]LogInit:Display: LogLinker:Warning: CreateExport: Failed to load Parent for Function /Game/PC_Blueprints/Weapons/NonCharWeapon/TurretWeap_MG.TurretWeap_MG_C:UserConstructionScript; removing parent information, but keeping function
UE4Editor-Cmd: [2015.12.19-04.15.19:613][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning Can't connect pins Current Controller and Target : AIController Base Infantry Reference is not compatible with AIController Basic AI Reference.
UE4Editor-Cmd: [2015.12.19-04.15.19:614][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning Can't connect pins Target and Current Controller : AIController Basic AI Reference is not compatible with AIController Base Infantry Reference.
UE4Editor-Cmd: [2015.12.19-04.15.19:615][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning Can't connect pins Controller and Target : AIController Base Infantry Reference (by ref) is not compatible with AIController Basic AI Reference.
UE4Editor-Cmd: [2015.12.19-04.15.19:615][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning Can't connect pins Target and Controller : AIController Basic AI Reference is not compatible with AIController Base Infantry Reference (by ref).
UE4Editor-Cmd: [2015.12.19-04.15.19:616][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning [0029.75] Compile of CoverManager successful, but with 4 Warning(s) [in 27 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:617][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning [0029.75] Compile of CoverManager successful, but with 5 Warning(s) [in 1 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:618][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning [0029.75] Compile of CoverManager successful, but with 6 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:618][ 0]LogInit:Display: LogBlueprint:Warning: ExposeOnSpawn ambiguity. Property 'NameProperty /Engine/Transient.REINST_MasterWidget_SquadListChild_C_35:UnitID', MetaData 'False', Flag 'True'
UE4Editor-Cmd: [2015.12.19-04.15.19:619][ 0]LogInit:Display: LogBlueprint:Warning: ExposeOnSpawn ambiguity. Property 'ObjectProperty /Engine/Transient.REINST_MasterWidget_SquadListChild_C_35:Squad', MetaData 'False', Flag 'True'
UE4Editor-Cmd: [2015.12.19-04.15.19:619][ 0]LogInit:Display: LogMaterial:Warning: Failed to compile Material /Game/PC_Characters/Weapons/GSF_SATM/M_SATMMissile.M_SATMMissile for platform PCD3D_SM4, Default Material will be used in game.
UE4Editor-Cmd: [2015.12.19-04.15.19:620][ 0]LogInit:Display: LogMaterial:Warning: (Node TextureSample) TextureSample> Sampler type is Color, should be Linear Color for /Game/PC_Characters/Weapons/GSF_SATM/Missle_metallic.Missle_metallic
UE4Editor-Cmd: [2015.12.19-04.15.19:621][ 0]LogInit:Display: LogMaterial:Warning: (Node TextureSample) TextureSample> Sampler type is Color, should be Linear Color for /Game/PC_Characters/Weapons/GSF_SATM/Missle_roughness.Missle_roughness
UE4Editor-Cmd: [2015.12.19-04.15.19:621][ 0]LogInit:Display: LogLinker:Warning: Can't find file '/Game/ProjectCombine/ModularMeshes/Trims/Trims1'
UE4Editor-Cmd: [2015.12.19-04.15.19:622][ 0]LogInit:Display: LogUObjectGlobals:Warning: Failed to load '/Game/ProjectCombine/ModularMeshes/Trims/Trims1': Can't find file '/Game/ProjectCombine/ModularMeshes/Trims/Trims1'
UE4Editor-Cmd: [2015.12.19-04.15.19:622][ 0]LogInit:Display: LogUObjectGlobals:Warning: Failed to find object 'Object /Game/ProjectCombine/ModularMeshes/Trims/Trims1.Trims1'
UE4Editor-Cmd: [2015.12.19-04.15.19:623][ 0]LogInit:Display: LogLinker:Warning: CreateExport: Failed to load Parent for Function /Game/ProceduralTrash/Blueprints/TrashPlacer_StaticLighting.TrashPlacer_StaticLighting_C:UserConstructionScript; removing parent information, but keeping function
UE4Editor-Cmd: [2015.12.19-04.15.19:624][ 0]LogInit:Display: LogUObjectGlobals:Warning: Failed to find object 'Object /Script/CoreUObject.Object.Transform'
UE4Editor-Cmd: [2015.12.19-04.15.19:624][ 0]LogInit:Display: LogLinker:Warning: CreateExport: Failed to load Parent for Function /Game/ProceduralTrash/Blueprints/TrashPlacer_DynamicLighting.TrashPlacer_DynamicLighting_C:UserConstructionScript; removing parent information, but keeping function
UE4Editor-Cmd: [2015.12.19-04.15.19:625][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0046.43] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 2 Warning(s) [in 28 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:626][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0046.43] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 3 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:627][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0046.43] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 4 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:628][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0046.48] Compile of GSF_RTSPanelButtonWidget successful, but with 2 Warning(s) [in 16 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:628][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0046.48] Compile of GSF_RTSPanelButtonWidget successful, but with 3 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:629][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0046.48] Compile of GSF_RTSPanelButtonWidget successful, but with 4 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:630][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning [0049.66] Compile of CoverManager successful, but with 4 Warning(s) [in 26 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:631][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning [0049.66] Compile of CoverManager successful, but with 5 Warning(s) [in 1 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:631][ 0]LogInit:Display: LogBlueprint:Warning: [compiler CoverManager] Warning [0049.66] Compile of CoverManager successful, but with 6 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:632][ 0]LogInit:Display: LogBlueprint:Warning: ExposeOnSpawn ambiguity. Property 'NameProperty /Engine/Transient.REINST_MasterWidget_SquadListChild_C_109:UnitID', MetaData 'False', Flag 'True'
UE4Editor-Cmd: [2015.12.19-04.15.19:633][ 0]LogInit:Display: LogBlueprint:Warning: ExposeOnSpawn ambiguity. Property 'ObjectProperty /Engine/Transient.REINST_MasterWidget_SquadListChild_C_109:Squad', MetaData 'False', Flag 'True'
UE4Editor-Cmd: [2015.12.19-04.15.19:633][ 0]LogInit:Display: LogUObjectGlobals:Warning: Failed to find object 'Object /Script/CoreUObject.Object.Vector'
UE4Editor-Cmd: [2015.12.19-04.15.19:634][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0062.29] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 2 Warning(s) [in 24 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:635][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0062.29] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 3 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:636][ 0]LogInit:Display: LogBlueprint:Warning: [compiler MasterWidget_RTSPanelButtonWidget] Warning [0062.29] Compile of MasterWidget_RTSPanelButtonWidget successful, but with 4 Warning(s) [in 0 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:636][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0062.34] Compile of GSF_RTSPanelButtonWidget successful, but with 2 Warning(s) [in 16 ms]
UE4Editor-Cmd: [2015.12.19-04.15.19:637][ 0]LogInit:Display: LogBlueprint:Warning: [compiler GSF_RTSPanelButtonWidget] Warning [0062.34] Compile of GSF_RTSPanelButtonWidget successful, but with 3 Warning(s) [in 0 ms]
Thanks!