Level 3 - Advanced training - assigment 2 Performer - Missing hash value in message box

I’m currently doing the advanced training, level 3, and I can’t finish the second assignment.
I keep failing, and it seems like the culprit may be a missing value in the alert box that pop ups when you upload a yearly report.

But, what is strange is that even thought the value is missing, it does seem to create an invisible (but unusable…) hash (see attached debug printscreen).

See attached screenshots for the bug.
I’m using IE 11 for this task, but id does seem to affect other browsers as well…!

So right now, I’m unable to finish this task.

I’ve made some tests, and the hash value ONLY disappears when the alert box does not have any checkbox. Again, see attached printscreens…