I installed no machine remote server a few days ago and was able to connect, work remotely from another computer and log out, but now after every login I get this.
This happens all the time after login, when usually the graphical interface server takes over. I've tried connecting again and it connects well and I can log in remote too, but afterwards it goes into this screen. Both in Remote desktop and in front of the computer.
You could try to disable the gnome extension "Zorin appindicators" and maybe other gnome extensions (keep Zorin menu and the Zorin taskbar or dock) for testing.
Install gnome extension manager
and then go to tab "installed" to disable the extension.
You can also test if it makes a difference when you switch from Wayland to Xorg. At loginscreen (cogwheal) you can switch between the both.