Can't subscribe channels - "Ungültige Parametergröße" "Invailed Parameter Size"

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Hey! First of all I had an Issue, that MyTeamspeak shouted out an error every 4 minutes or something saying "size to large bookmark" or something, but I want to report something else, cause I don't know where this is coming from. So the main thing is that I had an Error every Time I joined a... Can't subscribe channels - "Ungültige Parametergröße" "Invailed Parameter Size"