Domain limit exceeded (Crusader Kings 3)
I write on the buildings (where you improve them or build new ones) the domain limit is exceededand they do not give any bonuses building type disabled
epileptick1d
This means that you have too many controlled territories in your personal possession. You need to either increase the management skill (it seems like he is responsible for the domain, when you hover over there, a hint will pop up which skill), or distribute lands to existing vassals, or create new vassals by transferring lands to landless members of the court. I advise you to transfer the lands to characters who have good management and military skills, then he will give you more troops for the war, and he will quickly put the territory in order and generally increase your status, and he will pay more taxes.
I draw your attention to the fact that it is not recommended to transfer lands of a higher rank that are not yours de jure, because there will be a fine. those. if you have a county title for three baronies, you can safely hand out baronies to new vassals, since you are a count, and these lands are de jure yours. When there is a kingdom, it will be even easier. In the first couples, if you start for a small state, this can be a problem, especially with the tribal system