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