This mod requires the "ArmouredBiters - 2.1 update" by slightlygrilled, which at the time was an attempt to bring Armoured Biters into 2.1 when it had not been updated yet, but it has also not been updated since before base 2.1 went official. CybranM has since updated his original "Armoured Biters" mod to 2.1 ... have you considered switching back to his Armoured Biters dependency now that it's been updated?
