I been browsing my vassals by using the realm tree, doesn't crash for me. Are you still having this issue?
What OS are you using?
Which tooltip specifically is the one that crashes the game? E.g. when you hoover over a portrait?
Does it crash when the regular tooltip appears, or when the extended part of a tooltip is shown?
Are you playing as a specific character, or does it happen with any character?
Have you updated the game to the latest version of 2.3.2 (MMUR)? Is it still happening in that version?
You might try to completely re-install the game, by removing it from Steam and also by deleting the "Crusader Kings II" folder in Documents (or equivalent, depending on OS). Just remember to backup any save games you might want to keep!
What OS are you using?
Which tooltip specifically is the one that crashes the game? E.g. when you hoover over a portrait?
Does it crash when the regular tooltip appears, or when the extended part of a tooltip is shown?
Are you playing as a specific character, or does it happen with any character?
Have you updated the game to the latest version of 2.3.2 (MMUR)? Is it still happening in that version?
You might try to completely re-install the game, by removing it from Steam and also by deleting the "Crusader Kings II" folder in Documents (or equivalent, depending on OS). Just remember to backup any save games you might want to keep!