Just to clarify, a local power cycle of the panel would require fully disconnecting power from the Concord and ADC Module, AC transformer and battery. Allow it to remain powered down for 30 seconds or so before re-applying power, battery first then transformer.
The panel should go through a Bus Scan upon power up.
Interlogix indicated that a prior module shouldn’t cause this failure by itself and a new one should be found by the scan. The problem may instead be a combination of this and the Access Code Lock feature, ADC support indicated that they have seen this before.
We’ve sent over a couple commands to change the Installer Code to default 4321. Can you try that to see if it works? If not unfortunately the existing installer code will be required locally to resolve.