Don’t know what browser you are using, but could also try closing everything out before trying again.
Also maybe turn your computer or laptop off as the last step in the above process.
If you are on a mobile device, or IPad, also could try a hard reset, pressing the home button and off at the same time, to power off.
Lest I sound like a computer geek, trust that I am not, but I do have an adult son who is an IT wizard and these are all things he has walked me thru when I have been stuck with something.
Maggie