Thanks for the information about compatibility, but the fact is I'm still facing the same problem.
Maybe I didn't explain myself very well. Let's try again:
When I try to write a question using Artof as default editor, I get a popup message that says "Question is required" after clicking on the
Save or
Apply button, leaving me unable to save the question. This doesn't happen with TinyMCE (one of Joomla's default editors).
I tried the solution stated in
this post, since Artof is also based on CKEditor, but it didn't work.
Is there something else I can try, that doesn't require me to swith the default editor before working on ARI Quiz Lite? I would like to use Artof for ARI Quiz Lite, as it is the default editor on my site. It's a little inconvenient having to swith the default editor just to type some questions on ARI Quiz Lite, then switch back to Artof for everything else.