I tried downloading the app from the website as well as installing an old version (from my old laptop), but the problem remains unsolved(
@Natasha English - Try disabling Hardware acceleration.
I know this can be done in a browser (how-to here), but I think there is the option in the desktop app too. I can't remember exactly where, but from your Dashboard tab, press the Alt key - this will expose the menu bar:
From here, look for Hardware acceleration under all of the options (File, View, Edit, etc.).
@Robert Johnson thank you so much, I found it. I pressed Alt → help > hardware acceleration