My current ruler has fulfilled every qualifier for an invasion other than the 75% liege loyalty faction, however she does have 100+% crown loyalty. I figured "that's a weird oversight" and went to manually switch people from crown loyalty to liege loyalty, however when I switched to my vassals liege loyalty wasn't even given as an option. This obviously raises two questions; first, what are the qualifiers for joining/creating and liege loyalty faction? and secondly, why are both types not considered to allow the invasion? I had to stop my game because continuing would waste the great window for an attack I was about to seize, so a speedy response on how to fix this would be appreciated 