Constantly getting a pop up saying there was an error

You should be able to fix this by removing the ā€œAnKingOverhaul (AnKing / AnKingMed)ā€ notetype from Tools > Manage Notetypes. Can you confirm itā€™s unused by any cards? If itā€™s actually used, I assume itā€™ll be broken and will not have all the usual fields in the AnKing deck.