Why am I having problems with my Gmail account?

It could be your browser that hasn't been updated in a long time, or whatever device you normally use to log in to your Gmail account has some issues. First, it is possible that your device or its browser is not compatible with Gmail, or that a browser extension may be causing problems with Gmail. If the problem with Gmail is related to a particular web browser, it's highly likely that you're using a browser extension or plugin that conflicts with Gmail.

See also - https://vocal.media/lifehack/how-can-you-fix-gmail-not-loading-problem