"Unknown Holy Order title preventing ALL marriage"

As the title suggests. I tried booting the game up again without submods, but that just causes a gameover screen.

Problem: www.dropbox.com/s/h8cji92vrj1l5xa/Untitled.png?dl=0 

Save File: www.dropbox.com/s/lys3rrvatc0jh3d/THUNDERKOC8307_03_05%20-%20Copy%20-%20Copy%20-%20Copy.ck2?dl=0

Help me Chads,

for you are my only hope.