Error: certificate has expired

Dear Experts

I am getting the below error while hitting backend service from SAP BAS:
Error: certificate has expired

at TLSSocket.onConnectSecure (_tls_wrap.js:XXXX)

at TLSSocket.emit (events.js:XXXX)

at TLSSocket._finishInit (_tls_wrap.js:XXXX)

at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:XXXX)

at TLSWrap.callbackTrampoline (internal/async_hooks.js:XXXX)

Cloud Connector is Up and Running. Service is Accessible from On Prem Server. Facing this issue from almost 2:00 PM IST 24 Jun 2021.

Kindly Help.

Regards

Anmol