The signature or decryption was invalid

Hello, I have been trying to solve a problem, it happens that I sign and encrypt my request, and everything is fine. The issue is when I get the response it doesn't allow me to decrypt and sign, even though I'm using my private key. Do you know what this problem is due to and how I can solve it, I attach screenshots of the situation.

In addition, the response is serialized with an XOP type, as you can see in the first 2 screenshots. Thank you very much.