message: add logging when we fail to join a room
diff: @@ -272,6 +272,7 @@ class RoomViewStore extends Store {
  err: err,
  });
  let msg = err.message ? err.message : JSON.stringify(err);
  + console.log("Failed to join room:", msg);
  // XXX: We are relying on the error message returned by browsers here.
  // This isn't great, but it does generalize the error being shown to users.
  if (msg && msg.startsWith("CORS request rejected")) {
  