Trying a different internet service does the trick. Some websites do better with google chrome than with others. So i would try to play around with that. Internet connection can be a factor. You dind't indicate if this was a website you are visiting or if this is a website you are managing....

Reload the page.

Use another web browser.

Wait 10 minutes and try again, if you are using a sub-domain, there are sometimes server errors, and it is just a waiting game.