Cayenne Issue "CERTIFICATE HS EXPIRED

TTN Network and Services
1

The setup I have is:
1.- Using the things UNO board
2.- also The things gateway

I am also using the connection with cayenne, receiving data from TTN UNO ( UPLINK)
and sending data ( DOWNLINK) to the uno everything was working fine up and till today which I started
receiving the the legend in red in CAYENNE template area " PROBLEM SENDING COMMAND: CERTIFICATE HAS EXPIRED" does anybody has idea, has to what is happening, any help is much appreciated.

2

This started happening to me today. The same setup and code worked fine yesterday. Cayenne uplinks still work fine but now downlinks get this error when Cayenne tries to sent to TTN.