usb.core.NoBackendError: No backend available

[adminy]

running: ./venv/bin/cp210x-program.py gets:

Traceback (most recent call last):
  File "/root/homebridge/./venv/bin/cp210x-program.py", line 247, in <module>
    main()
  File "/root/homebridge/./venv/bin/cp210x-program.py", line 243, in main
    options.action(options)
  File "/root/homebridge/./venv/bin/cp210x-program.py", line 139, in read_cp210x
    usbdev = find_device(options.match)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/homebridge/./venv/bin/cp210x-program.py", line 133, in find_device
    for dev in cp210x.Cp210xProgrammer.list_devices(usb_patterns):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/homebridge/venv/lib/python3.11/site-packages/cp210x/cp210x.py", line 196, in list_devices
    return usb.core.find(find_all=True, custom_match=Cp210xMatch(patterns))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/homebridge/venv/lib/python3.11/site-packages/usb/core.py", line 1309, in find
    raise NoBackendError('No backend available')
usb.core.NoBackendError: No backend available

But there is:

lsusb -t
/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/2p, 480M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/2p, 480M
    |__ Port 001: Dev 009, If 0, Class=Vendor Specific Class, Driver=[none], 480M
    |__ Port 001: Dev 009, If 1, Class=Vendor Specific Class, Driver=[none], 480M
    |__ Port 002: Dev 008, If 0, Class=Vendor Specific Class, Driver=cp210x, 12M.       <<<<<<<<<<<<<<<<
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/1p, 5000M