Unable to convert <server member> to a server member

[mondellbit069]

after set up the bot from https://github.com/cheran-senthil/TLE, i can't do anything like gitgud or duel (the error is below). can anyone help me?
(can identify or set handle, but gitgud, gimme, duel error)

[algmyr]

Are you running a recent version? That error message with the user ending in #0 should not be possible in code from the last 7 months or so
https://github.com/cheran-senthil/TLE/blob/master/tle/util/codeforces_common.py#L232-L241