Carbide motion for Raspberry Pi doesn't open

[WillAdams (William Adams (Carbide 3D))]

There was a recent discussion of this:

Error: Cutter not found - Pi Build 578 / Pro 5

I am scratching my head here, looking for ideas on further isolation of the issue. Been successfully using a Pi 4b+ with Motion 578 since day 1. Today went to start a job and could not connect to the cutter. I can connect and initialize if I connect the same USB to my MacBook. Reboots, updates, and trying different ports yield the same error. $ lsusb displays: MCS Shapeoko 5. But short of that, I can’t figure out why motion won’t open the connection. There are no other obvious options for me…