So as of right now i think aniwatch's server is dying!
The only solution is go to the new page "Hianime" (its basically the same site but all the mod and staffs are active there)
But there is a problem with the watchlist on that site (ie u can login with the same acc used in aniwatch but the watchlist will be the ones u added 4 months ago) this is cus they moved to the other site 4 months ago and left this site active. Technically its their fault not informing the active users in aniwatch that they build a new web page and all of staffs have moved to that!
The solution for the watchlist is to just take screenshots of it (or write it ) and add it to Hianime
For the people who's gonna stay in this page for little bit longer and expect them to fix this.. i hate to break it to you I dont think they're gonna fix this (but some part of me is saying its gonna get fixed).
Anyways i do think moving to Hianime is gonna be a good thing cus its more stable than this shitt
If u have any doubts, go to their discord and make a post asking the mods or staffs available there!