This issue has been addressed in Illustrator version 24.0.3 (on MAC) & 24.0.2 (on WIN). Please update to the latest version to verify that your issue is addressed or not.
Thanks & Regards,
Illustrator TeamANNOYED commented
This problem with pop up mentioning modified or missing links every 2 to 3 minutes is unacceptable. I have been using Adobe Illustrator since its original release. It's become the primary software that I use in my daily work. Ever since you released CC and got into the stock photo business your software has become more and more glitchy. I see mentions of this on here from as far back as October 2017. This is seriously impeding my workflow. If you're upgrades are making your users lives more difficult that's obviously a problem you should be attending to. PLEASE FIX THIS!! And whoever decided to remove holding shift to keep aspect ratio in Photoshop needs to find another profession : [