You need to find sha1-x86_64.asm to view the source for the current call stack frame
Exception thrown at 0x00007FFCBBEF4FA3 (UE4Editor-XMPP.dll) in UE4Editor.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF.
堆栈信息就是 UE4Editor-XMPP.dll ! sha1_block_data_order() Line 1438