Likely the expired security certificate.
You need to block port 123 udp as described in the following thread: Troubleshooting SmartThings Hub 2018 and Aeotec Hub
remember to unblock the port to complete the process
Likely the expired security certificate.
You need to block port 123 udp as described in the following thread: Troubleshooting SmartThings Hub 2018 and Aeotec Hub
remember to unblock the port to complete the process