Peer certificate rejected by chain verifier in receiver rest adapter

Hi All,

Can you please suggest me on the below issue....!

I am working on proxy to rest interface. in this case i am getting error in rest receiver channel (ping channel)

Error: peer certificate rejected by chain verifier

I have imported certificates in NWA which is given by third party. but still i am getting same error in ping channel. Please find the screenshot below

But when i am trying to connect with SOAP channel , it is working fine.

Please refer NWA certificate screen shot.

Here i am using HTTPS url to connect with third party.

Can you please check my channel configuration below...

Please check and suggest me.. whether i need to change any configuration or changes from PI side??