message: Be defensive with channelOnboardingChecker
diff: @@ -22,7 +22,8 @@ const Dialog = styled(ModalDialog).attrs({
  const channelOnboardingChecker = (WrappedChannelComponent) => {
  class ChannelOnboardingChecker extends React.Component {
  componentDidMount() {
  - const { data: { channel: { id } } } = this.props;
  + const { data: { channel } } = this.props;
  + const id = channel && channel.id;
  if (getChannelOnboardingCookie(id)) {
  const modal = new Modal(IntroduceChannel, {}, { Dialog });
  