Fatal Error crashes on servertravel

Exception thrown at 0x00000001410BADAB in Game-Win64-Shipping.exe: 0xC0000005: Access violation reading location 0x0000000100000030.

After debugging the crash in visual studio the crash seems to happen at this breakpoint:

void RequestIsComplete()
	{
		check(bRequestOutstanding);
		if (!bCanceled && Priority > AIOP_Precache)
		{
			GatherResults();
		}
		SetComplete();
		FScopeLock Lock(&FPakReadRequestEvent);
		bRequestOutstanding = false;
		if (WaitEvent)
		{
			WaitEvent->Trigger();     (<----BREAK POINT)
		}
	}

This function is in IPlatformFilePak.cpp