Carbon won’t work in PT/won’t update firmware

[nunasentus]

hello all!

I just bought a used carbon, Protools studio was working great with my mbox studio and apollos, but i purchased the carbon and then upgraded to ultimate.

Sessions still work great with ultimate using my other interfaces but carbon, although seen by AVB and outputting clean core audio, will not show up in playback engine apart from saying "you have one carbon device that needs a newer version of pro tools", even opening the playback engine window PT will stall and spin the wheel for a good 2 minutes before showing this.

I tried downgrading from 2023.12 to 2023.09 as well as updating to Mac Ventura from Monterey.
I did a factory reset on the carbon and tried multiple cat cables with my sonnet adapter but I don’t receive any firmware update messages from PT and when i try with carbon central it says i need to update but the updates fail every time reading error 1205.
The same issue happens on both my m2 macbook pro as well as my m1 ultra mac studio.

Anyone have any advice or same situations, thanks!