Big Sur blocks Apps running that have worked previously with a "You do not have permission to open the application _____"

First reaction is to ask - are the apps in question compatible with Big Sur. Due diligence would require the User to verify this information before passing blame on Apple. Just because they may have worked on previous version of macOS does not automatically translate to work on Big Sur. Often time - Developers are behind on making compatible apps for newer OSs.

What if a steam game that I have downloaded is already compatible with both Big Sur and the new M1 chip? I was playing it until suddenly I wasn't allowed to. I checked the game files and I saw something to do with profiles, once I clicked it says "Profile expired" with the date. I clicked install and it says "Installation failed" What do I do after this point?

I'm having this issue with the Messages app. I just set up my new Macbook Pro 13" with Big Sur. I've allowed messages to be forwarded to this new device and new messages show up in a message banner even, but when I try to actually open the Messages app it says, "You do not have permission to open the application “Messages.app”.

I started having this issue yesterday on my M1 pro running latest Big Sur. It began with my Mac Pro login pw not working, although it’s the same login pw I’ve used since - no joke - 1995.

I booted into recovery, reset the pw, and all of a sudden many apps wouldn’t open - zoom, messages, word, slack etc. reinstalling them worked, but this issue has definitely messed with saved passwords, preferences, and seemingly deleted or moved my user files (desktop, docs, downloads).

My guess is a corrupted user Acct, but I have no way to confirm this.

I'm also having the same issue/message. I have a brand new MacBook Air out of the box and I'm trying to download Vassal. Now sure what else to do to try to fix this. I'm the administrator, so not sure what the problem is.