mySQL connection problem

Since 2018R1 I cannot connect to mySQL Servers, even in projects that did work before. I always get Error 2003. Any ideas?

You should check your connection/firewall twice. Maybe the Port changed, the connection is blocked by a firwall or the Server is simply not running?

Nothing has changed on the server side. And I can still connect with the same credentials from the same computer using a different app (e.g. Sequel Pro). So it must have to do something with Xojo.

The compiled versions of my programs are still working fine, the problem only arises when running the IDE.

Sorry, just found Little Snitch responsible for this… so you were right!