I am almost there to complete “Learn Relational Databases by Building a Mario Database” course. The this error this showing.
Looking at the course page, it seems that all the relational database courses are under maintenance at the moment and that CodeAlly might not work at all (as opposed to providing users impromptu lessons in diagnosing and working around bugs they can’t easily fix).
Ideally, some notice in advance and an estimated down-time would be provided for stuff like this, but beggars can’t be choosers, and with how buggy it’s been, the question of significant maintenance is really more of a “when” rather than an “if”.
It’s probably best to just work on another course until the maintenance notice goes away.