50400: Programmable Chat: User not member of channelERROR: 50400error-50400 page anchorERROR Error - 50400error---50400 page anchor IP Messaging: User not member of channelip-messaging-user-not-member-of-channel page anchor Possible Causespossible-causes page anchor Specified User is not member of this Channel. Possible Solutionspossible-solutions page anchor Confirm a valid User who is Member of this Channel is being passed in request.