Course is not created after pressing "Create course" button

I’m trying to create a course, but the UI hangs forever. The screenshot is done after I pressed “Create course” button. See the progress indicator at the top. The course template repository is created, the course repository itself is not. Looks like a bug.

I was trying to create a course from time to time and it looks like I was able to do it recently.

Never received the confirmation from UI, progress indicator was still active, but the repos were created.

Ok, I tried testing creating a course based on the repository resulted from the previous actions.

Result: UI hangs, no course seems to be created.

Tried to create a new course repository once again, the same symptoms as initially

After some time, the course seemed to appear at “

A confirmation in the UI or an e-mail might have helped.