My save happens to crash apparently with "Internal error" after installing HST and mk3.
Stdout:
MinidumpCallback: dumpPath "K:/Program Files/Steam/userdata/222534911/1066780/local/crash_dump/", minidumpId "6aed7cfb-7207-4666-9a95-d421886879ce", succeeded 1local time is Sat Aug 29 02:09:10 2020
An error just occurred.c:\build\tpf2_steam\src\lib\ecs\engine.cpp:660: void __cdecl ecs::Engine::EndModification(void): Assertion `!m_notificationInProcessDEBUG' failed.
It happens about every 2 or 3 days.And saves in that several hours will all crash.