Plutonium

i got plutonium to run on ubuntu20.04 but i cant add a directory for bo2 mp/zm, it always just says "the selection contains a non-folder object", ive had it running before but i had to reinstall ubuntu and now i cant get it working again

sorry for reviving a dead discussion, but wheres plutonium at with linux rn
i just moved ubuntu recently and i'd love to be able to play mp and zm again