Monster token attack errors when running Sunless Citadel

Hi.  I am running the Sunless Citadel module and I need some help.  For some monsters, when I select a weapon to attack with from the monster character sheet I am getting an error.  For example, I choose a goblin token, I call up the character sheet and I choose to attack with his scimitar and I get the following error: No attribute was found for @{Goblin|attack_display_flag}