Hello,
I just did an upgrade from 1.7.8.6 to 1.7.8.7 - via OneClick and now I get a 400 bad request.
Not sure but there was an issue where I probably reloaded the One Click page - can this result in a parallel "double upgrade" or so?
I have the automated backup though but I don't know how to rollback (if that is the best action) without the backoffice.
Help is very much appreciated!