No that was not possible either, we were not able to access the admin page! so I just renamed the plugin folder with a FTP-client . Normally wordpress reacts with an page where it is clear that the plugins cannot be found .. but instead we were still not able to log in.
So my conclusion was that the DB was already broken ..
We managed to build the website again with all the backup stuff etc. we had and we hope that it will not occur anymore.
But the “new website” seems to be a little unstable as well. I saw that in the db there was a little overhead so I fixed that and optimized the DB maybe some cache issues. Can you recommend a cache plugin that works fine with the Enfold theme?
thank you in advance..

cheers

Moos