mavftp: AttributeError: 'NoneType' object has no attribute 'opcode'

[Ryanf55]

$ mavproxy.py --out wsserver:127.0.0.1:5555 --console  --master :14550
/home/ryan/.local/bin/mavproxy.py:4: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
  __import__('pkg_resources').require('MAVProxy==1.8.71')
Connect :14550 source_system=255
Loaded module console
Running script (/home/ryan/.mavinit.scr)
Loaded module graph
Unknown command 'map set showsimpos 1'
Unknown command 'map set showsimpos 0'
Unknown command 'map set showclicktime 0'
Log Directory: 
Telemetry log: mav.tlog
Waiting for heartbeat from :14550
MAV> Detected vehicle 1:68 on link 0
Detected vehicle 1:1 on link 0
MANUAL> Traceback (most recent call last):
  File "/home/ryan/Dev/ardu_ws/src/MAVProxy/MAVProxy/modules/mavproxy_link.py", line 1083, in master_callback
    mod.mavlink_packet(m)
  File "/home/ryan/Dev/ardu_ws/src/MAVProxy/MAVProxy/modules/mavproxy_ftp.py", line 740, in mavlink_packet
    if op.req_opcode == self.last_op.opcode and op.seq == (self.last_op.seq + 1) % 256:
AttributeError: 'NoneType' object has no attribute 'opcode'
Unable to load /home/ryan/.mavproxy/layout-5120x1440