Crashed when upgrading project from 5.4.2 to 5.5.0

Unity Engine
1

Failed at assets processing stage, no clue at all, try everything,
Sigh…
Gonna stay at 5.4.2 for a while I guess

2

What does the log file say? Did you submit the crash report with the bug reporter tool?

3

I did submit the crash report, after a series of testing, we were getting back to 5.4.2, and everything is working correctly right now, we probably will try to upgrade after a new version released.