The file "cover.ai" is in an unknown format and cannot be opened.

Hello @creativeb86048307,

Would you mind providing some details about the circumstances under which these files were saved or edited and the location of the files where they were stored? For example, were there any unexpected Illustrator crashes, sudden app closures, system shutdowns, or power cuts during the editing process?

Also, kindly share a link to a sample file after uploading to Dropbox/Google Drive/etc. so we can check it on our end. Although we cannot guarantee a successful recovery, we will try our best to do so.

Looking forward to hearing from you.

Anubhav