PGP Encryption Exception in File and SFTP receiver adapter.

Scenario: We have got the PGP (Private and Public key pair) and stored the same in PI server path.

We have sample partner Public key which is store at temporary shared location for testing purpose.

Issue: While doing the encryption we are getting below exception in case of File Adapter and SFTP adapter.

Case 1: File Receiver Adapter

Case 1: SFTP Receiver Adapter

Can anyone please suggest on below exception?

How to proceed to resolve the above issue or what should be the cause of the issue?

Thanks,

Vertika