Crash while trying to add fixtures after update

After updating to the latest open beta build for the recent update, I can’t add any fixtures to any of the cars I have made. Here is the error trace:

Fatal error: [File:D:\workspace\UE4-Camso\Engine\Source\Runtime\CoreUObject\Private\Serialization\AsyncLoading.cpp] [Line: 6592]
LoadPackageAsync failed to begin to load a package because the supplied package name was neither a valid long package name nor a filename of a map within a content folder: ‘’ or ‘/Corvette_Grille02/grille3C_editor’

KERNELBASE.dll!0x000000007E48A388
AutomationGame-Win64-Shipping.exe!FOutputDeviceWindowsError::Serialize()
AutomationGame-Win64-Shipping.exe!FOutputD

Clearing the cache has had no effect, nor has reverting to the last stable release - so what is the solution?

The solution is to manually delete everything but Editor and Runtime in the plugins folder:
Steam\steamapps\common\Automation\WindowsNoEditor\AutomationGame\Plugins

After opting into the latest build of the LCV3 open beta, I’ve encountered a different kind of error, with this trace:

Fatal error: [File:Unknown] [Line: 1380]
Node None 0 Package_LoadSummary has zero prerequisites, but has not been queued.

0x00007ff935bfa388 KERNELBASE.dll!UnknownFunction []
0x00007ff7a374c759 AutomationGame-Win64-Shipping.exe!FWindowsErrorOutputDevice::Serialize() []
0x00007ff7a371a6e7 AutomationGame-Win64-Shipping.exe!FOutputDevice::LogfImpl() []
0x00007ff7a36c4238 AutomationGame-Win64-Shipping.exe!FDebug::AssertFailed() []
0x00007ff7a38d7693 AutomationGame-Win64-Shipping.exe!FEventLoadGraph::CheckForCycles() []
0x00007ff7a38f2988 AutomationGame-Win64-Shipping.exe!FAsyncLoadingThread::TickAsyncThread() []
0x00007ff7a38eee08 AutomationGame-Win64-Shipping.exe!FAsyncLoadingThread::Run() []
0x00007ff7a374c4c7 AutomationGame-Win64-Shipping.exe!FRunnableThreadWin::Run() []
0x00007ff7a37434dc AutomationGame-Win64-Shipping.exe!FRunnableThreadWin::GuardedRun() []
0x00007ff9385f3034 KERNEL32.DLL!UnknownFunction []
0x00007ff9393d3691 ntdll.dll!UnknownFunction []

Crash in runnable thread FAsyncLoadingThread

Is there a solution to this one?

Apart from the same solution? :slight_smile:
Make sure you nuke your plugins (i.e. mods!) and try again, that is the most common cause for this.

I tried just that but it had no effect. Are there any other solutions?

Have you tried to clear out your cache?
Either via the launcher button for it (openbeta branch), or by deleting %LocalAppData%\AutomationGame

Clearing the cache from the launcher turned out to be the solution that worked for me. Now I can finally place, edit and remove fixtures on my cars as usual.