Device not found is the general catch-all error. Providing you installed the correct driver and are using windows your switch should show up like this in device manager:
Then you would need to create a filter for it using libusb which is also available on the USB-Botbase page. If it's already installed filters can be installed using Program Files\LibUSB-Win32\bin\install-filter-win.exe
Don't use the IP address/sysbot controls, the USB functionality is in its own seperate group box.
ACNHPoker and the NHSE inventory injection window are extremely similar things. I could add USB functionality to ACNHPoker but you'd run into the same problem which as far as I can tell is a driver issue.
USB functionality will likely only allow one service at a time until something that allows you to transfer files and get access to RAM at the same time is made, so nxmtp won't work at the same time as USB-Botbase.
Do you know if this is safe to use in PATCHED switch island?
Like moving the HACKED Switch User to PATCHED Switch Island and cheating items there locally.