I don’t have that. Do I need to install it?
It is installed automatically with Ubuntu Budgie unless you did a minimal install.
Look for budgie previews via budgie welcome - software - budgie extras
I did a minimal install. Also, it looks like you’re talking about the Previews applet which doesn’t resolve the issue.
Previews is no longer an applet, but a mini-app, also in 21.10. If you activate it, the message goes away and hotcorners performs the action.
I’ve installed the Previews mini app from Budgie Extras, but Expose isn’t working and I get the message about a missing process if I change the Hot Corner action. I logged out, but that didn’t seem to help.
Look for previews control in your menu - run the app and tick the checkbox to activate it.
Finally! Thank you! Preview Controls shows up in the menu after installing the mini app. Much appreciated!