AutomationTool exiting with ExitCode=8 (8)

Hello! Sorry, I’m totally new to game engines and a bit lost with this problem.

LogDerivedDataCache: C:/Users/onrik/AppData/Local/UnrealEngine/Common/DerivedDataCache: Maintenance finished in +00:00:00.000 and deleted 0 files with total size 0 MiB and 0 empty folders. Scanned 0 files in 1 folders with total size 0 MiB.
LogUObjectHash: Compacting FUObjectHashTables data took   0.51ms
LogTurnkeySupport: Project requires temp target (Landmass plugin is enabled)
LogLauncherProfile: Unable to use promoted target - D:/Unreal Engine/LockedIn/Binaries/Win64/UnrealGame-Win64-Shipping.target does not exist.
LogMonitoredProcess: Running Serialized UAT: [ cmd.exe /c ""E:/Program Files/UE_5.5/Engine/Build/BatchFiles/RunUAT.bat"  -ScriptsForProject="D:/Unreal Engine/LockedIn/LockedIn.uproject" Turnkey -command=VerifySdk -platform=Win64 -UpdateIfNeeded -EditorIO -EditorIOPort=51777  -project="D:/Unreal Engine/LockedIn/LockedIn.uproject" BuildCookRun -nop4 -utf8output -nocompileeditor -skipbuildeditor -cook  -project="D:/Unreal Engine/LockedIn/LockedIn.uproject"  -unrealexe="E:\Program Files\UE_5.5\Engine\Binaries\Win64\UnrealEditor-Cmd.exe" -platform=Win64 -installed -stage -archive -package -build -p
ak -iostore -compressed -prereqs -archivedirectory="D:/Build" -clientconfig=Development" -nocompile -nocompileuat ]
UATHelper: Packaging (Windows): Running AutomationTool...
UATHelper: Packaging (Windows): Using bundled DotNet SDK version: 8.0.300
UATHelper: Packaging (Windows): Starting AutomationTool...
UATHelper: Packaging (Windows): Parsing command line: -ScriptsForProject="D:/Unreal Engine/LockedIn/LockedIn.uproject" Turnkey -command=VerifySdk -platform=Win64 -UpdateIfNeeded -EditorIO -EditorIOPort=51777 -project="D:/Unreal Engine/LockedIn/LockedIn.uproject" BuildCookRun -nop4 -utf8output -nocompileeditor -skipbuildeditor -cook -project="D:/Unreal Engine/LockedIn/LockedIn.uproject" -unrealexe="E:\Program Files\UE_5.5\Engine\Binaries\Win64\UnrealEditor-Cmd.exe" -platform=Win64 -installed -stage -archive -package -build -pak -iostore -compressed -prereqs -archivedirectory=D:/Build -clientcon
fig=Development -nocompile -nocompileuat
UATHelper: Packaging (Windows): Initializing script modules...
UATHelper: Packaging (Windows): Total script module initialization time: 0.24 s.
UATHelper: Packaging (Windows): Using C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin\MSBuild.exe
UATHelper: Packaging (Windows): Executing commands...
UATHelper: Packaging (Windows): Installed Sdk validity:
UATHelper: Packaging (Windows): Win64: (Status=Valid, MinAllowed_Sdk=10.0.19041.0, MaxAllowed_Sdk=10.9.99999.0, Current_Sdk=10.0.22621.0, Allowed_AutoSdk=10.0.22621.0, Current_AutoSdk=, Flags="InstalledSdk_ValidVersionExists, Sdk_HasBestVersion")
UATHelper: Packaging (Windows): Scanning for envvar changes...
UATHelper: Packaging (Windows): ... done! 
UATHelper: Packaging (Windows): Cleaning Temp Paths...
UATHelper: Packaging (Windows): BUILD SUCCESSFUL
UATHelper: Packaging (Windows): Setting up ProjectParams for D:\Unreal Engine\LockedIn\LockedIn.uproject
UATHelper: Packaging (Windows): ********** BUILD COMMAND STARTED **********
UATHelper: Packaging (Windows): Running: E:\Program Files\UE_5.5\Engine\Binaries\ThirdParty\DotNet\8.0.300\win-x64\dotnet.exe "E:\Program Files\UE_5.5\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll" LockedIn Win64 Development -Project="D:\Unreal Engine\LockedIn\LockedIn.uproject" -Manifest="D:\Unreal Engine\LockedIn\Intermediate\Build\Manifest.xml"  -remoteini="D:\Unreal Engine\LockedIn"  -skipdeploy  -log="C:\Users\onrik\AppData\Roaming\Unreal Engine\AutomationTool\Logs\E+Program+Files+UE_5.5\UBA-LockedIn-Win64-Development.txt"
UATHelper: Packaging (Windows): Log file: C:\Users\onrik\AppData\Roaming\Unreal Engine\AutomationTool\Logs\E+Program+Files+UE_5.5\UBA-LockedIn-Win64-Development.txt
UATHelper: Packaging (Windows): Creating makefile for LockedIn (no existing makefile)
UATHelper: Packaging (Windows): Compiled assembly file 'C:\Users\onrik\AppData\Local\UnrealEngine\Intermediate\Build\BuildRules\MarketplaceRules.dll' appears to be for a newer CLR version or is otherwise invalid.  Unreal Build Tool will try to recompile this assembly now.  (Exception: Bad IL format. The format of the file 'C:\Users\onrik\AppData\Local\UnrealEngine\Intermediate\Build\BuildRules\MarketplaceRules.dll' is invalid.)
UATHelper: Packaging (Windows): E:\Program Files\UE_5.5\Engine\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\MaterialAssignment\MaterialAssignment.Build.cs(6,14): error CS0101: The namespace '<global namespace>' already contains a definition for 'MaterialAssignment'
UATHelper: Packaging (Windows): E:\Program Files\UE_5.5\Engine\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\ObjectDistribution\ObjectDistribution.Build.cs(6,14): error CS0101: The namespace '<global namespace>' already contains a definition for 'ObjectDistribution'
UATHelper: Packaging (Windows): E:\Program Files\UE_5.5\Engine\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\MaterialAssignment\MaterialAssignment.Build.cs(8,9): error CS0111: Type 'MaterialAssignment' already defines a member called 'MaterialAssignment' with the same parameter types
UATHelper: Packaging (Windows): E:\Program Files\UE_5.5\Engine\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\ObjectDistribution\ObjectDistribution.Build.cs(8,9): error CS0111: Type 'ObjectDistribution' already defines a member called 'ObjectDistribution' with the same parameter types
UATHelper: Packaging (Windows): D:\Unreal Engine\LockedIn\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\MaterialAssignment\MaterialAssignment.Build.cs(6,14): error CS0101: The namespace '<global namespace>' already contains a definition for 'MaterialAssignment'
UATHelper: Packaging (Windows): D:\Unreal Engine\LockedIn\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\ObjectDistribution\ObjectDistribution.Build.cs(6,14): error CS0101: The namespace '<global namespace>' already contains a definition for 'ObjectDistribution'
UATHelper: Packaging (Windows): D:\Unreal Engine\LockedIn\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\ObjectDistribution\ObjectDistribution.Build.cs(8,9): error CS0111: Type 'ObjectDistribution' already defines a member called 'ObjectDistribution' with the same parameter types
UATHelper: Packaging (Windows): D:\Unreal Engine\LockedIn\Plugins\Marketplace\Ultimate6d2628bd839dV6\Source\MaterialAssignment\MaterialAssignment.Build.cs(8,9): error CS0111: Type 'MaterialAssignment' already defines a member called 'MaterialAssignment' with the same parameter types
UATHelper: Packaging (Windows): Total execution time: 1.40 seconds
UATHelper: Packaging (Windows): Expecting to find a type to be declared in a target rules named 'LockedInTarget'.  This type must derive from the 'TargetRules' type defined by UnrealBuildTool.
UATHelper: Packaging (Windows): Took 1.53s to run dotnet.exe, ExitCode=8
UATHelper: Packaging (Windows): UnrealBuildTool failed. See log for more details. (C:\Users\onrik\AppData\Roaming\Unreal Engine\AutomationTool\Logs\E+Program+Files+UE_5.5\UBA-LockedIn-Win64-Development.txt)
UATHelper: Packaging (Windows): AutomationTool executed for 0h 0m 3s
UATHelper: Packaging (Windows): AutomationTool exiting with ExitCode=8 (8)
UATHelper: Packaging (Windows): BUILD FAILED
PackagingResults: Error: Unknown Error

Fixed by removing plugins, topic can be closed.