Traceback (most recent call last):
  File "/tmp/.mount_electrPENbrv/usr/lib/python3.7/site-packages/trezorlib/client.py", line 107, in cancel
    self._raw_write(messages.Cancel())
  File "/tmp/.mount_electrPENbrv/usr/lib/python3.7/site-packages/trezorlib/client.py", line 127, in _raw_write
    self.transport.write(msg_type, msg_bytes)
  File "/tmp/.mount_electrPENbrv/usr/lib/python3.7/site-packages/trezorlib/transport/bridge.py", line 159, in write
    self.handle.write_buf(header + message_data)
  File "/tmp/.mount_electrPENbrv/usr/lib/python3.7/site-packages/trezorlib/transport/bridge.py", line 68, in write_buf
    self.transport._call("post", data=buf.hex())
  File "/tmp/.mount_electrPENbrv/usr/lib/python3.7/site-packages/trezorlib/transport/bridge.py", line 135, in _call
    return call_bridge(uri, data=data)
  File "/tmp/.mount_electrPENbrv/usr/lib/python3.7/site-packages/trezorlib/transport/bridge.py", line 44, in call_bridge
    raise TransportException(error_str)
trezorlib.transport.TransportException: trezord: post/10 failed with code 400: other call in progress