I wanted to inquire about an issue that we faced today on our production site out of the blue.
All of our courses suddenly disappeared (the content, not the entries). I wanted to attach a screenshot but all of a sudden I no longer have access to the entire site (see screenshot attached). I have no idea what the issue could be.

Things to note:
- We did not perform any updates/upgrades
- We did not perform any migration
- We did not install/uninstall any plugins.
In fact, we weren't working on the server at all today, when all of a sudden a student reported this issue. Your help is highly appreciated.
Version 4.2.1+ (Build: 20230629)