An easy fix is to start your game in v.1.0.3 and then convert it to 1.1. While in 1.0.3, you can view everyone in the encyclopedia and then you lose it once you go to 1.1. But it also sounds like 1.1 has so many other bugs that 1.0.3 is more stable and better option to play right now. Potential companions are found in towns, inside taverns. The rule is simple - potential companions stay in taverns. All you have to do is visit any town and check the tavern - if a potential companion is there, you will see its icon, just like in the picture above. Press the CLAN button (L) , then along the top of the screen are a few other buttons, hit parties. Should see a list of your companions etc. Find the one that has the party and disband it. Is there any way to get them to follow you with their party or say help you attack a person/settlement? I couldn’t find any. .

mount and blade 2 bannerlord where to find companions