I am having a problem, where earlier in my campaign I was able to annex my vassals, but now around turn 150 it is not letting me. The annex button just says “foreign lands”. Is there a fix to this?

I was able to annex my vassal. But it crashed on next player turn. AI went through.
(the public order for army still persist as I can see) even though the script took the army away.
I hope there is a cancel button for Annex option. Right now its a must feature rather than take a consideration function.
Ty GOOD mod
edit; Mith Campaign