I'm very sorry, in theory, when loading the scenario, you should also load all the factions with their heraldry. Try it manually through the campaign editor - go to the campaign editor in the main menu - load the Baltic scenario - then find all the settlements of Lithuania and manually assign each one to the Lithuanian faction (Troyden) Right-click on the settlement and in the context menu select Troyden from the list of factions (if you downloaded the Troyden customization)

i am sorry it didnt help its just a white cross when i open the campaing and then a completly purple icon when playing

try downloading Lithuania customization

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3371809262

the emblem of Lithuania doesnt load

any dependancys?