ms_gpio.cfg not found

I have gotten some used 3630sm units and can’t get them to authenticate. This is an established and function network with many other PMP 320 gear in use functionally.
Two things stand out in the logs of the units I purchased.
1. APPS/app - MS GPIO manager configuration file /tffs/ms_gpio.cfg not found.

2. PKMS/Denial - unknown SS for cid 0x022D

The firmware was updated from 6.5.1 to 7.1.3 then to 8.1.4 when I received them.
I have also reset them to factory defaults through the web interface.

I assume that the denial is directly related to the missing ms_gpio.cfg file. Can anyone confirm this?
If so, how might I go about fixing this without sending off to RMA?

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