Hello @ugo23268394nfoq,
Thanks for reaching out. Please try resetting the preferences for Illustrator by following the steps in this article and share your observations with us: https://helpx.adobe.com/illustrator/using/setting-preferences.html.
Disclaimer: 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.
Looking forward to hearing from you.
Thanks,
Anubhav