Hi there,
Sorry for the delayed response. Could you please share some more details like:
- OS and version of Illustrator
- When did this start happening? Are there any recent changes made to your system? For example, any antivirus, system updates, or web extensions installed recently.
- Are you able to login into Illustrator and Creative Cloud app? If you are already logged in, try logging out and logging in within Illustrator from the Help menu > Sign Out/In.
Also, you may visit this link (https://assets.adobe.com/cloud-documents) to check all your Cloud documents and visit this link (https://assets.adobe.com/deleted) to check all the deleted Cloud documents. Let us know if you are able to locate your lost Cloud documents.
Thanks & Regards,
Anshul Saini