CloudFree Ductless HVAC Wi-Fi Module - MrCool

Hi folks
I just got three of the SMARTLIGHT SLWF-01 Pro v2.1 modules. I have two mrcool hvac units. The module is working in one of them (mrcool 12k 3rd gen), I can control the unit via home assistant and see sensor values. But the other one isn’t working (mrcool 18k 3rd gen). I tried swapping out the module in the non-working unit with my module, but same behavior. The module itself is pingable and I can visit its :80 status page. Here is a sample of the logs:

17:28:40	[D]	[ApplianceBase:139]	
Response timeout...
17:28:40	[D]	[ApplianceBase:146]	
Sending request again. Attempts left: 1...
17:28:40	[D]	[ApplianceBase:162]	
TX: AA 22 AC 8E 00 00 00 00 00 03 41 21 01 44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 78 2D 51 
17:28:42	[D]	[ApplianceBase:139]	
Response timeout...
17:28:42	[D]	[ApplianceBase:154]	
Destroying the request...
17:28:42	[D]	[AirConditioner:178]	
Enqueuing a GET_STATUS(0x41) request...
17:28:42	[D]	[ApplianceBase:173]	
Enqueuing the request...
17:28:42	[D]	[ApplianceBase:075]	
Getting and sending a request from the queue...
17:28:42	[D]	[ApplianceBase:162]	
TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 79 53 0F 
17:28:44	[D]	[ApplianceBase:139]	
Response timeout...
17:28:44	[D]	[ApplianceBase:146]	
Sending request again. Attempts left: 2...
17:28:44	[D]	[ApplianceBase:162]	
TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 79 53 0F 
17:28:46	[D]	[ApplianceBase:139]	
Response timeout...
17:28:46	[D]	[ApplianceBase:146]	
Sending request again. Attempts left: 1...
17:28:46	[D]	[ApplianceBase:162]	
TX: AA 21 AC 8D 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 79 53 0F 
17:28:48	[D]	[ApplianceBase:139]	
Response timeout...
17:28:48	[D]	[ApplianceBase:154]	
Destroying the request...

Dumb question… is the request/timeout going from the USB module to my HA server? Or is it going from the USB module to my HVAC unit? I’m not clear on exactly what the failure is. Thank you

Also, if this is not the best place for this question, please let me know!