It's probably one of three things

YouTube is immensely popular, many of us watch at least one video a day, so we will eventually encounter an error. The most common one is the error message "an error has occurred, please try again later".

Videos won't play when this error message appears, but there are several ways to fix it.

The error message usually appears when you try to play a YouTube video, as the cause affects the entire platform. In some cases, you may only encounter it when playing specific videos. Either way, you’re likely dealing with corrupt browser files, a broken DNS cache, or an adblocker gone haywire.