I get the same result if I send the command manually, using /quote. I quit all my channels before attempting this, since the instructions say I should send the command before joining any channels.
Any ideas? All of the information I’ve found seems to be from middle of last year, so I may be operating on out-of-date information.
ZNC thinks you are requesting that CAP from itself, not Twitch. Personally I use the perform module in ZNC to automatically send the CAPs when ZNC connection to the Twitch server.
Hmmm, I thought I had that same command in there at one point, but maybe disconnecting and reconnecting wasn’t enough (this time I actually disabled that server and then re-enabled it).
Anyway, I appear to have a user list now! Thanks for your help.