50400: Programmable Chat: User not member of channelPositive FeedbackNegative FeedbackERROR: 50400error-50400 page anchorPositive FeedbackNegative FeedbackPROGRAMMABLE CHATERROR Error - 50400error---50400 page anchorPositive FeedbackNegative Feedback Programmable Chat: User not member of channelprogrammable-chat-user-not-member-of-channel page anchorPositive FeedbackNegative Feedback 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.