If the address will not open
Switch the phone between Wi-Fi and mobile data first: school, office and public networks often filter film sites by name. Then check the spelling against the addresses page, since many of the old endings belong to other sites now.
If a page looks broken
Reload it, then clear this site's data in the browser settings. An old saved copy is the usual cause, and a fresh load brings back the red slabs and the poster ribbons.
If a video will not start
Videos play on the service you open from Watch now, so the fix is on that service: reload its player, sign in again, or choose the next service on the list. If a service shows a region message, check that your viewing country on AntMovies matches where you are.
If the list is empty
My List lives in your browser. A private window, a different browser or cleared site data starts a fresh list, and your original one returns when you go back to the browser you built it in.