[ERROR] Could not find matching PulseAudio input source

[catto24]

catto@penguin:~/usbaudio/x$ usbaudio -s (my-phones-serial-key)
[INFO] Device: [a-thing-that-i-think-i-should-censor] (my-phones-serial-key-again)
[INFO] Audio forwarding enabled
[ERROR] Could not find matching PulseAudio input source
catto@penguin:~/usbaudio/x$ 

i get this error when running both usbaudio and usb audio -s (my-phones-serial-key-again-again). i just installed it and already a problem pls help