@joutico777 use ViaFabricPlus version 4.0.4, not the one aviable on the Aristois addons feature. Ive tried it and it works, you can play 1.21.5 servers using Aristois 1.21.4
It's not stuck anywhere, it's due to a texture pack you have loaded. Remove them from the folder or join the vanilla profile to remove all packs (including programmer art)