Node JS errors when connecting to UCP

on one of our systems we’re seeing this this moring after logging into UCP:

**Unable to connect to the UCP Node Server.
Error: xhr poll error
**
In chromes developer tools console I see this error:

:8003/socket.io/?token=2b80dfdead92c622c0a660aebd510f05&EIO=3&transport=polling&t=PebfEqz:1 Failed to load resource: net::ERR_CERT_DATE_INVALID

The SSL certificate on the system is valid and the system date seems to be fine.

I’ve already done an fwconsole restart, re-applied the current certificate (our own) for the https in system admin. checked for module updates etc… any other suggestions? I see a lot of historical posts on this issue but they never seem to end in a solid solution.

I re-uploaded the certificates in admin > certificate management and the error went away.