Mobile preview crash

MachineId:1041A3734F4AA53D71CBAA92CD4ABEDB
EpicAccountId:

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

UE4Editor_Engine + 3802230 bytes
UE4Editor_Engine + 3703790 bytes

UE4Editor!FEngineLoop::Init() + 1147 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launchengineloop.cpp:1919]
UE4Editor!GuardedMain() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launch.cpp:126]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

Every time i am trying to test my game in mobile preview, it crashes.
It is not crashes all the time, but after a few modification / creations its starting to crash.

How can i track down what causes the crash?

The error code does not help me to find it out:
Access violation - code c0000005 (first/second chance not available)