A good place to report is this thread - report forum errors.
It outlines the format which enables us to collect the right info to track and resolve.
Current issues are max_user_connections which suggests a lot of people are visiting the forum. Perhaps, though usually weeknights are the busy nights and there is not an unusually high number of visitors.
As the issue was coming up a bit - I cleared sessions (meaning members may need to log in). Sorry if there was lost data, I wanted to give members the chance to save however the problems were coming hard and fast so had to resolve quickly. Technically I have looked at the database and checked for errors (none) and optimised some databases. The host is aware of the issues and we are looking into the cause.

