I had macos 11.5 public beta 4 installed and upgraded to Monterey. The upgrade finished without an issue bringing me to the log in screen. I enter my credentials, I get a black screen for a couple of seconds only to return to the login screen. I boot in safe mode and manage to login but I am getting the WindowServer crashing. I removed all startup Apps and rebooted but the issue persists. I then tried to go back to Big Sur through Recovery mode and I get an error "The operation couldn't be completed. (com.apple.BuildInfo.preflight.error error 21.)", while at the stage of picking the drive to install it on (my primary ssd) Any ideas?

I have created a Bootcamp partition but when I try to mount it using Disk Utility I get the following error "Could not mount “BOOTCAMP”. (com.apple.DiskManagement.disenter error 49223.)I am using Parallels and it fails to start the VM and I believe that this is the reasonCurrently, I use build 19A501iAny help, would be greatly appreciated