The issue is related to the signature algorithm being used:
-> Signature Algorithm : sha256NoSign
-> Algorithm being used is not supported:
https://docops.ca.com/ca-single-sign-on/12-52-sp1/en/configuring/partnership-federation/encryption-and-decryption-algorithms
-> Sign Algorithms:
- MD5withRSA, SHA1withRSA, SHA256withRSA & SHA512withRSA
As you see, there's no mention of sha256NoSign