DennisC

There shouldn't be an issue as long as you meet the requirements from the wiki:
Requirements
If you are migrating Insteon you must have a compatible PLM Eisy / Polisy supports these PLMs: 2412S, 2413S, 2413U, and 2448A7 If you have a 2413S (serial), you will need our Serial PLM Kit If you are migrating your Z-Wave Network, you must have our ZMatter Z-Wave USB Dongle If you are using Polisy, you can alternatively use our ZMatter Z-Wave Board for Polisy  
After restoring your backup, you will need to follow the directions from the wiki below to restore the PLM.
If you are using Insteon Go to the Admin Console configuration tab and make sure INSTEON Support is enabled (default username/pwd = admin/admin) If you are using a new PLM, Restore the PLM

I did the migration from Polisy with Zooz dongle to eisy with Zwave Matter this morning. Other than a brief issue with migrating UD Mobile favorites, which Javi took care of right away, all went fine.
Follow the wiki instructions which were just updated again.
I believe I saw in the wiki that you can go back to Zooz dongle if you don't make Zwave changes.

Try going thru the troubleshooting steps here:
https://wiki.universal-devices.com/index.php?title=Main_Page#ISY_Cannot_Communicate_with_ISY_Portal
and here:
https://wiki.universal-devices.com/index.php?title=Main_Page#Admin_Console_Minimized/Invisible_and_Cannot_be_Restored
and here:
https://wiki.universal-devices.com/index.php?title=Main_Page#admin.jnlp_does_not_start_the_Admin_Console

Try going thru the troubleshooting steps here:
https://wiki.universal-devices.com/index.php?title=Main_Page#ISY_Cannot_Communicate_with_ISY_Portal
and here:
https://wiki.universal-devices.com/index.php?title=Main_Page#Admin_Console_Minimized/Invisible_and_Cannot_be_Restored
and here:
https://wiki.universal-devices.com/index.php?title=Main_Page#admin.jnlp_does_not_start_the_Admin_Console
 
 
 
 

Polisy is not currently available due to supply chain issues. UD will be coming out with a new Matter compatible unit to reace Polisy.
It was scheduled to be available before the end of the month.

You can do this now in UD Mobile. From your favorites screen select the pencil in upper right corner, click ok on message, select the icon, then select configure colors/ values/icons.
Then select add and write the rule you would like to use. I have if area 1 armed status = disarmed set color to hec color code for green. The second rule sets color to red if armed.
Check the UD Mobile user guide for more details.

Try checking the router for the new IP address and make sure the sub-domain hasn't changed.
If all else fails, have you tried the instructions from the wiki:
https://wiki.universal-devices.com/index.php?title=Main_Page#Changed_ISP.2FRouter_-_Can_no_longer_access_ISY
A word of caution, this method requires a good back up.