Open Only see blank in Join Appspot

when I try to enter https://joinjoaomgcd.appspot.com/, it shows nothing. Can anyone help? I have pasted the console below.


[Deprecation] HTML Imports is deprecated and will be removed in M73, around March 2019. Please use ES modules instead. See https://www.chromestatus.com/features/5144752345317376 for more details.

Unchecked runtime.lastError: The message port closed before a response was received.
(index):1

Unchecked runtime.lastError: The message port closed before a response was received.
content.googleapis.com/static/proxy.html?usegapi=1&jsh=m%3B%2F_%2Fscs%2Fapps-static%2F_%2Fjs%2Fk%3Doz.gapi.zh_TW.yHKJ9ebYyA0.O%2Fam%3DwQ%2Frt%3Dj%2Fd%3D1%2Frs%3DAGLTcCNv6yDxhO5O0UlCQpx4Cw5yo6OlBw%2Fm%3D__features__#parent=https%3A%2F%2Fjoinjoaomgcd.appspot.com&rpctoken=489173317:1

Unchecked runtime.lastError: The message port closed before a response was received.
/_ah/api/static/proxy.html?usegapi=1&jsh=m%3B%2F_%2Fscs%2Fapps-static%2F_%2Fjs%2Fk%3Doz.gapi.zh_TW.yHKJ9ebYyA0.O%2Fam%3DwQ%2Frt%3Dj%2Fd%3D1%2Frs%3DAGLTcCNv6yDxhO5O0UlCQpx4Cw5yo6OlBw%2Fm%3D__features__#parent=https%3A%2F%2Fjoinjoaomgcd.appspot.com&rpctoken=741314124:1

Unchecked runtime.lastError: The message port closed before a response was received.
(index):1 Unchecked runtime.lastError: The message port closed before a response was received.
accounts.google.com/o/oauth2/iframe#origin=https%3A%2F%2Fjoinjoaomgcd.appspot.com&rpcToken=527694063.43882394:1

Unchecked runtime.lastError: The message port closed before a response was received.
polymer-micro.html:263

[Deprecation] document.registerElement is deprecated and will be removed in M73, around March 2019. Please use window.customElements.define instead. See https://www.chromestatus.com/features/4642138092470272 for more details.
(anonymous) @ polymer-micro.html:263
(anonymous) @ polymer-micro.html:273

(index):42 Not initing join yet: APIs not ready

(index):49 Everything ready. Initing now!!

start.js:6 https://content.googleapis.com/stat...//joinjoaomgcd.appspot.com&rpctoken=489173317
start.js:8 content.googleapis.com
start.js:6 https://joinjoaomgcd.appspot.com/_a...//joinjoaomgcd.appspot.com&rpctoken=741314124
start.js:8 joinjoaomgcd.appspot.com
start.js:6 https://joinjoaomgcd.appspot.com/
start.js:8 joinjoaomgcd.appspot.com
start.js:6 https://accounts.google.com/o/oauth...omgcd.appspot.com&rpcToken=527694063.43882394
start.js:8 accounts.google.com

 

Thank you very much! After white listing cookies, everything goes fine!