hutchs,
Wow, how old is your installation as the UC Server isn't supported on the MiVO-250 anymore.
Anyway, the error is quite clear, "No Route to Host - The server is not reachable. Please check your network configuration settings", which is typically a DNS or Gateway issue not an SSL Certificate issue.
It also says to look at the cim.log file for more information, but it probably won't provide you any more information than you already have.
I am moving this to the correct forum as well since this should be in the Application forum not the MiVO-250 forum.
Thanks,
TE