Fail to cook with System.ArgumentOutOfRangeException error

So i’m trying to do a little modding with the Post Scriptum SDK but i am unable to cook anything. As far as i can tell from the log the cooking itself works just fine but the next step (stage command) throws a
System.ArgumentOutOfRangeException
error. And i am out of ideas what the problem might be.

I tried to not use my level as cooking target and use levels provided by the SDK trying to isolate the issue away from me being stupid in my own project.

Reinstalled all the VisualStudio stuff.

Verify the SDK in Epic Store.

Make new mod (aka new *.mi) and or delete the failed attempts folders.

Run the editor as admin.

Any idea what i might be missing?

This is the relevant part of the log (i cant seem to put the whole thing here)

Log.WriteException: ArgumentOutOfRangeException: Der Index lag außerhalb des Bereichs. Er darf nicht negativ und kleiner als die Sammlung sein.
Log.WriteException: Parametername: index
Log.WriteException:    bei System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
Log.WriteException:    bei System.Collections.Generic.List`1.get_Item(Int32 index)
Log.WriteException:    bei Project.CreatePaksUsingChunkManifests(ProjectParams Params, DeploymentContext SC) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Scripts\CopyBuildToStagingDirectory.Automation.cs:Zeile 1919.
Log.WriteException:    bei Project.ApplyStagingManifest(ProjectParams Params, DeploymentContext SC) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Scripts\CopyBuildToStagingDirectory.Automation.cs:Zeile 2264.
Log.WriteException:    bei Project.CopyBuildToStagingDirectory(ProjectParams Params) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Scripts\CopyBuildToStagingDirectory.Automation.cs:Zeile 2806.
Log.WriteException:    bei BuildCookRun.DoBuildCookRun(ProjectParams Params) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Scripts\BuildCookRun.Automation.cs:Zeile 219.
Log.WriteException:    bei BuildCookRun.ExecuteBuild() in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Scripts\BuildCookRun.Automation.cs:Zeile 41.
Log.WriteException:    bei AutomationTool.BuildCommand.Execute() in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\AutomationUtils\BuildCommand.cs:Zeile 242.
Log.WriteException:    bei AutomationTool.Automation.Execute(List`1 CommandsToExecute, Dictionary`2 Commands) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\AutomationUtils\Automation.cs:Zeile 564.
Log.WriteException:    bei AutomationTool.Automation.Process(String[] Arguments, StartupTraceListener StartupListener) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\AutomationUtils\Automation.cs:Zeile 534.
Log.WriteException:    bei AutomationTool.Program.MainProc(String[] Arguments, StartupTraceListener StartupListener) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Program.cs:Zeile 173.
Log.WriteException:    bei AutomationTool.Program.<>c__DisplayClass1_0.b__2() in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Program.cs:Zeile 99.
Log.WriteException:    bei AutomationTool.InternalUtils.RunSingleInstance(Func`1 Main) in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\AutomationUtils\Utils.cs:Zeile 725.
Log.WriteException:    bei AutomationTool.Program.Main() in D:\Post_Scriptum_Depot\UnrealEngine\Engine\Source\Programs\AutomationTool\Program.cs:Zeile 99.
Log.WriteException: ==============================================================================
Program.Main: AutomationTool exiting with ExitCode=1 (Error_Unknown)