I went to the console and checked, caused by the service worker so I download "no service worker" extension and it works.

@Afku2137 Nice, just to add on, since this issue only happens on youtube live chat, you can just only enable this extension on youtube and disable it on other website as service worker is used to make the website to load faster (slightly faster) and have notifications, so it is better to have service worker enabled on other websites.

To do this just go to youtube -> top right extension -> triple dot beside the no service worker -> page access -> always run on youtube

@Afku2137 Nice, just to add on, since this issue only happens on youtube live chat, you can just only enable this extension on youtube and disable it on other website as service worker is used to make the website to load faster (slightly faster) and have notifications, so it is better to have service worker enabled on other websites.

To do this just go to youtube -> top right extension -> triple dot beside the no service worker -> page access -> always run on youtube

@TheStormBum If u saw something like
"The FetchEvent for "https://www.youtube.com/live_chat?......" resulted in a network error response: the promise was rejected." then it's probably caused by service worker. You can also try to click the url to see if you can access the website or not.

@TheStormBum for my case it's service worker, idk about yrs, have to check the console on yr own.

I went to the console and checked, caused by the service worker so I download "no service worker" extension and it works.