Upgrade 1.7.6.8 to 1.7.7.0 failed, can't access BO and FO please help ASAP

[ArnasL]

Hello everyone

I have tried to update from 1.7.6.8 to 1.7.7.0 and now I can't access BO and FO. I just keep seeing errors:

https://www.dropbox.com/s/eyfbucigek4oq7s/Screenshot 2020-12-08 at 18.26.37.png?dl=0

I don't have backup but I pretty sure we can restore website without it because when I started upgrading I get instant error (3-5s after click Ugprade) that upgrade failed and I was unable to access BO and FO. So I think not a lot of files has been modified and I think database is not even touched. Please help

P.S. I have tried previously updates from 1.7.6.2 to .. to 1.7.6.8 and all succeed without problems. Is there any way to check 1-Click upgrade logs?