The Request tries to store a Public Key in Twilio. This public key cannot be parsed. Only supported key format is X.509 PEM. The prefix and suffix (-----BEGIN PUBLIC KEY-----) of the key can be present (but not mandatory).
Possible Solution:
Make sure the public key is correct in the request:
The key is in X.509 PEM format
There are no copy paste errors
All the parts of the key are present in the request.