Not sure why I'm unable to log into Polyglot?

@Rex Gruenwald additional information needed....

What device are you using?

What's the error it's giving you?

Have you tried the default admin/admin login?

Did you update the system recently that it could be stuck or not loaded?

Have you attempted a power cycle?

Please let us know the error and what troubleshooting you've attempted then maybe more tips can be attempted. 

503, service unavaiable, everything else running fine, 100+ Insteon devices on Eisy, also running new Zigbee module but was not able to login prior to either.  Also tried power cyclcle

@Rex Gruenwald a 503 error makes it sound like you're not even able to see the login page. Is that the case? If so then PG3 might not be running correctly. Did you run an update process recently that might have failed to complete? When you power cycled the device did you allow a while for it to fully boot before trying?

I would suggest you open a support ticket with UD to get proper support for resolving.

https://www.universal-devices.com/my-tickets

Please be sure to post here what is done to resolve your issue.