I'm having trouble creating the Kingdom of Sicily in this mod. I started as the Duke of Apulia in 1066 and now it's almost 1100 and I have I think 70% of the required territories. I'm still Norman. I have sufficient cash and prestige, so why can't I create the title? Is there a hidden requirement not listed in-game? Thanks.
Do you have 150 piety? Also try gaining more de jure land, I had to do that to create the Grand Duchy of Lithuania.