We have the fix available in the latest release. Please update Illustrator using Adobe Creative Cloud application to the latest build for version Illustrator CC 22.1.
Please refer to our knowledge base FAQ – https://illustrator.uservoice.com/knowledgebase/articles/1844590 if you face difficulty in update.
Or get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator
Adobe. Make It an Experience.
An error occurred while saving the commentTeemu commented
Godamn.. how can this kind of f*ckups exist on software that should have been tested and tried?
..anyways, for time being, ALT + O seems to be solution to get rid of the warning message, so you don't need to force quit Illustrator. I haven't found any other way to close the warning..