well i had the mod one a few days ago it worked just fine until it randomly just stoped working every time i open luner it just shows the mojang screen for ever i waited hours n it didnt work n i made sure its waveycapes n not any other mod is there a way to fix this? btw its on 1.21.1

Lunar is just taking people's mods without permission (like my 3d skin layers and replay mod) and then gets people to pay for overpriced cosmetics/"premium features". Their client is 100% never going to be supported for any of my mods. https://microcontrollersdev.github.io/Alternatives/1.8.9/lunar_client/

what other client do you suggest

None or Essential.