Looks like a string of sites have shut down over fears about being unmasked and legal action being taken against fmovies, who were running most of the sites.
https://kaido.to/home is being discussed as an alternative. I am unfamiliar and can’t vouch for it at this time though.
https://4anime.gg/ still exists and works too.
Damn, Kaido looks so slick, I remember when these websites looked like they were held together with 90s html and malware. I guess I’d better watch stuff before it all ends up getting taken down.