Don't feed them superworms! ju5tn is right they bite, and their hard shells are hard to digest. Even my giant bearded dragon has had trouble with em.
You should get your lizards examined by a vet.
A lizard who has problems dealing with or digesting a superworm is a sick lizard and needs medical attention. Lizards eat insects and all insects have exoskeletons. I've produced thousands of bearded dragons over the years and they will happily snap up and digest even hard shelled beetles (superworm beetles, june bugs, japanese beetles, stink bugs, random beetles found outside, superworms, mealworms, mealworm beetles, etc). My chameleons eat these without problems also.
Langerwerf produced and raised literally thousands of lizards on a primarily superworm diet and never had a problem from feeding them superworms.
I've used superworms myself since the early 90s and although I've never used them as an almost exclusive diet like langerwerf did for years, never had a problem and I've fed them to thousands of lizards also.
Superworms are an okay feeder choice. not the best, but certainly not the worst. they are high in fat so should not be a primary feeder. I suggest they make up 20% or less of the chameleons diet. And you must gutload them properly.