Gateway faulted after upgrade from 8.1.40 to 8.1.41

Gateway faulted after upgrade from 8.1.40 to 8.1.41

Please don't SHOUT in your question title. (I fixed it.)
You might need to open a ticket with support.
Sorry, bad reflex of capitalized
Post your wrapper.log files, or contact our support department officially (https://support.inductiveautomation.com/).
Sounds like the problem was in my gateway backup of 8.1.40, I have used my previous backup of 8.1.39 and i'm now functionnal with 8.1.41