Thanks for reaching out. Would you mind sharing the version of the OS & Illustrator?
I'd request resetting preferences of Adobe Illustrator and see if it helps. You may follow instructions on this help article to know how to do that.
**Please note that resetting preferences will remove all the custom settings and Illustrator will launch with default settings. You can also take a backup of the folders in case you want to. Location is mentioned in the article.
Let us know how it goes. Looking forward to your response.