Crash after switching from 4.15 to 4.16.

Hello.
I have a project in UE 4.15 that I want to convert to 4.16.
The editor loads, and the map loads, but after that, any blueprint compilations, starting a play session or even loading another level crashes the editor.
This is the error message that I get:

Access violation - code c0000005 (first/second chance not available)

UE4Editor_CoreUObject!TFastReferenceCollector<1,FGCReferenceProcessor<1>,FGCCollector<1>,FGCArrayPool,0>::ProcessObjectArray() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\public\uobject\fastreferencecollector.h:567]
UE4Editor_CoreUObject!TFastReferenceCollector<1,FGCReferenceProcessor<1>,FGCCollector<1>,FGCArrayPool,0>::FCollectorTaskQueue::DoTask() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\public\uobject\fastreferencecollector.h:167]
UE4Editor_CoreUObject!TGraphTask,FGCCollector<1>,FGCArrayPool,0>::FCollectorTaskProcessorTask>::ExecuteTask() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:883]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasks() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:1277]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasksUntilQuit() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:1171]
UE4Editor_Core!FTaskThreadBase::Run() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:643]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]

Any idea what can be done about that?