Error 500 when accessing Hub Mesh screen in settings

On my main hub (C-7) when I go into settings and click hub mesh, I get an Error 500 consistently. I rebooted the hub and it still does the same thing. Accessing other apps seems to work fine. Any suggestions?

More info.... nothing in logs.. The only thing that changed was I brought the old C5 hub (from which this one was migrated) up. Prior to bringing it up 3 days ago I had disabled Z-Wave and Zigbee and did a soft reset and changed the IP address. So when it came back online, it should have been fresh. Just now I did notice that it had the old mesh settings in it. I would have thought that would have refreshed as well. I have shut it down and shutdown my main hub, then brought up the main hub and now the main hub works fine. I tested it and if I bring the C5 up I cannot go into Mesh settings (error 500) on the main hub. I have to shut them both down and come back up with just the main hub. Even with Mesh disabled on the C5 the main hub has issues. It is obviously related to Mesh somehow. I guess that I will have to do a complete reset on the old hub.

Moral of that story is that if you are going to bring a hub that you migrated from, back online, you have to do a hard reset to flush out not only the old settings, apps, etc but the mesh settings and relationships as well.