I have a problem on the website. On several pages the left hand side of the screen is cut off and not viewable. I’ve tried everything.

Had the same problem - solved 2 minutes ago 😀.

P.e. at opera: there are three points up on the right side. Click on it and check "webside in desktop mode".

hmm?

Ok for me

The right-hand goes off the screen for me. Safari, macOS. Have you tried changing your browser's font size or page magnification?

There have been some issues with the Chrome browser not allowing pop-ups (as in the Rewards system) but each page has a significantly large white surround so if the image is off-screen it's probably a user setting in whatever browser you're using.