If you see a this check what it wanted and if it wanted that you don't have then if you play single player, their a trick ,

Face opposite to moschop and back save game and exit game ,after come back you get another demand of taming do this process until what you need for taming...

Best taming way

This guy is my favorite dino to start. It can farm LOTS of fiber, chitin, berries, rare mushrooms, rare flowers, polymer, etc. And it has a considerably good melee and health. But people don't see its value just because its a big coward iguana... Lmao. But for real, they're really one of the best dinos to get at the beginning, if not the best.