Unknown error when attempt to do check

When I attempt to do check on my answer at 'The Weapons' this error shows up: sys.stderr.write(strtraceback(e, *sys.excinfo())), File "/opt/project/runners/py3.py", line 191, in strtraceback, return strframes(ex, filename, gettracebackframes(filename, *args)),TypeError: gettracebackframes() missing 1 required positional argument: 'tb',

I don't understand what this means so I can't continue any further. Anyone know what is this about?

From: https://py.checkio.org/mission/the-weapons/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36