message: Null guard space inviter to prevent the app exploding
diff: @@ -192,11 +192,11 @@ const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }) =>
  if (inviteSender) {
  inviterSection = <div className="mx_SpaceRoomView_preview_inviter">
  - <MemberAvatar member={inviter} width={32} height={32} />
  + <MemberAvatar member={inviter} fallbackUserId={inviteSender} width={32} height={32} />
  <div>
  <div className="mx_SpaceRoomView_preview_inviter_name">
  { _t("<inviter/> invites you", {}, {
  - inviter: () => <b>{ inviter.name || inviteSender }</b>,
  + inviter: () => <b>{ inviter?.name || inviteSender }</b>,
  }) }
  </div>
  { inviter ? <div className="mx_SpaceRoomView_preview_inviter_mxid">
  