Issue when Upgraded to Pro

Just bought Elementor Pro today. Paid for the license fee, activated it correctly, and now elementor does not work.

The free version was working completely fine an hour ago so I know it’s not an issue with caching or any other plugins. Now, however, I tried deactivating the pro plugin as it’s separate and going back just to the original and it is not working either.

I’ve now completely lost elementor and was trying to get a landing page redesign done today as this was the main reason i purchased pro in the first place.

please help.
ben