That error occurs on bootup.
No, I don't have any USB settings in the UEFI. Nothing's plugged into that USB-C port... I wanted to plug my phone in there, but it's got no power and it transfers no data.
dmesg --level=warn shows:
usb: port power management may be unreliable
So I suspect this is the UEFI not being programmed properly... especially given that it was also throwing errors because it was mismanaging NetworkManager power for WiFi.