Upgrading CAS from 5.3.X to 6.0.X seems to break JWT Signing (and maybe Encryption? I cannot tell).
I am actually using nimbus library to verify/decrypt JWT produces by CAS.
What I have already tried :
2) Regenerating the AES keys produced by the CAS (I use the keys automatically used by CAS and then I put them into config, I do NOT generate keys by myself)
I upgraded to CAS 5.3.9 and everything works as usual.
Best regards