I have CK2+ 1.33.19 one but still happened like that
What else do you have? Because whatever the other mod or mods you've got is breaking your game. Look into each mod folder and find the \common\defines.lua file. Make sure that it has:
-- Title creation and usurpation requirements
DEJURE_COUNTY_LIMIT_TO_CREATE = 0.6, -- Fraction of de jure counties that you must control to create a non-imperial title
DEJURE_COUNTY_LIMIT_TO_USURP = 0.6, -- Fraction of de jure counties that you must control to usurp a non-imperial title
EMPIRE_DEJURE_COUNTY_LIMIT_TO_CREATE = 0.8, -- Fraction of de jure counties that you must control to create an imperial title
EMPIRE_DEJURE_COUNTY_LIMIT_TO_USURP = 0.8 -- Fraction of de jure counties that you must control to usurp an imperial title
In it. If it doesn't have the DEJURE_COUNTY_LIMIT_TO_CREATE ratio defined, it will be set at 5000% by default. I pulled these lines directly from the ck2+ 1.33.19 \common\defines.lua folder. Look at your other mods and see which one is bad and either add these lines to it or delete it.