I am using an old phone (Huawei P10 lite) and I didn't have any problems with it. But today I have a bug, that I can't see any text and can't open a study or open a new topic in forum or open the settings. Is this a bug on my phone or is this general?
Hmm - give this a try. outside of the app, long press on the icon, and click "more info". Then click "storage" and "clear storage" You will have to log back in again, but I'd like to see if that fixes it.