userEN

I use Evernote on Mac. I am trying to open a notebook but it shows "Can't open notebook: Either you need permission to access or the notebook was moved or deleted." I'm 100% sure that I didn't delete it, but now it is gone. I could only find a link to this notebook in the work chat that I had with one collaborator. The notebook is not accessible to my collaborator as well. Any idea on how I retrieve this important notebook? Thanks for any help in advance!