lucon

I am playing a Khuzait character on 1.5.9. I joined the nothern empire to help it survive. After a big battle with sturgia, Lucon, the northern emperor, has a blue exclamation mark on his army. I naturally clicked it. Then a weird dialog popped up. He says "Join me, then", or something like...

I'm trying to complete this quest but I have to speak to Lucon and he is being held prisoner and i have no way of speaking to him. Anyone have any idea as to what I am supposed to do at this point? Thanks in advance.

Hi, I'm experiencing an issue where if you are a vassal, the relations of your liege dramatically decreases from fighting battles and participating in sieges. After fighting just a few today, my relations to Lucon have dropped to -31 without even talking to him or doing anything which would...