We are able to reproduce this issue at our end and it is currently under review.
An error occurred while saving the commentAnonymous commented
So, I have noticed that unchecking Smart guides and rechecking smart guides seems to do the trick. It is a recurring problem so I have to do it every week or two.
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 23.0.
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.