Cubase Pro 8.5 and Monterey

Hello. Well my Cubase stopped working so upgraded mac from Mojave to Monterey. Happy to see my project will still play and record but I tried to edit and now my screen in white or greyed out when the cursor is at the top of the screen. Can I rescue it?

My problem is - do I have to upgrade to v12 to get it working? I’m an amateur and I find the upgrades so expensive. Logic is a lot cheaper and I’m told easier to learn. - but in the middle of a cubase project. Not a good time to change.

Any suggestions really welcome. xxx