It is caused by posting in big, bold type
So much for levity.
You are on Chopin. It is in the middle of being moved and there have been several issues. The mySQL might be one of them.
One thing you can check is to see if your configuration file has the DBhostname set to "localhost". Before the migration, scripts were working with it set to the name of the server, but that will no longer work.
General note: all the CMSs give very general error messages that make it very hard to pinpoint the problem.