The stream namespace attribute is something other than 'jabber:client' or 'jabber:server', or the content namespace is incorrect or absent. This is a stream-level error that terminates the stream.
stream-invalid-namespace
xmpp The stream namespace attribute is something other than 'jabber:client' or 'jabber:server', or the content namespace is incorrect or absent. This is a stream-level error that terminates the stream.