There was an error while trying to fetch the log

This morning some repo disappeared, I recreate the most urgent one but still and builds fail
There was an error while trying to fetch the log. GitHub integration seems broken

I can not figure out why

https://travis-ci.org/github/safe-together/specification

UPDATE:
I found that also the setting and the connection with GitHub were also lost. I restored them, and now I can see logs and the integration with gh-pages works.

It seems like a server crash and a restore was happened.

That’s probably due to