Tutorials: Tutorials get stuck sometimes

[martha-thomae]

After completing the task in the editor (following the instructions in the right order) and clicking on the "continue" button, sometimes the tutorial page gets stuck and one cannot move to the next step in the tutorial.

More details: After completing the task in the editor, the "continue" button of the tutorial gets unlocked. And, after this, sometimes it happens that as soon as I click on the button, it becomes locked again, but the page stays the same (I am not moved into the next step of the tutorial).

This doesn't happen all the time, but it happens on any tutorial at any stage.

Here are three examples:

• Tutorial 1 (XML Basics and Minimal MEI File Structure), step 4:

• Same tutorial, step 2:

• Tutorial 2 (Quickstart), step 2:

I don't think the network tab shows anything (I am including it here just in case), but the console seem to show the exact same error message every time the tutorial gets stuck.

I don't know if this might be related, but when the tutorial crashes I usually have my text cursor in the editor when clicking the continue button.

[musicEnfanthen]

Thanks @martha-thomae for reporting this issue!

Will try to reproduce the weird locking behaviour.

[bwbohl]

@martha-thomae can you still reproduce the problem since #139 was merged?