The document could no be autosaved. You don't have permission

I got this message on Keynote. I try to save on another location and I keep getting the same message. I have tried iCloud, same. I have checked the permissions using "Get Info" and nothing is locked nor there is anything weird with the permissions.

This problem happens when I am working on a file and I do not close from one day to the other, and I want to pick it where I left and keep working on it. The problem is that I do not want to loose the changes I made to my presentation. Is there any way to override this permission "wall"?

Working on a M1 MBA, base model. Sonoma 14.4.1