Why do I get a "Failed to login" error when trying to connect to google calendar?

How to check the console for errors

In case we ask you to look for errors in your browser's console, here's how you do it.

Help! My mini buttons are not showing anymore

My Marvin is slow, what can I do to improve performance?

Why don't tasks created in Marvin get synced to my calendar?

Help: Marvin is not loading

Marvin just keeps on running