org-web: Cannot Load the list of files in Google Drive from org-web.org

Hi.

I was able to use org-web from https://org-web.org/ with Google Drive on Firefox several weeks ago. However, when I tried to sign in today, I found that after I signed in to my Google account, the application cannot load the file list and it went back to the first page (https://org-web.org/).

I checked the HTTP requests. The status codes for the two HTTP request to Google Drive API are 403 with the following payload:

{
 "error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "dailyLimitExceededUnreg",
    "message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup.",
    "extendedHelp": "https://code.google.com/apis/console"
   }
  ],
  "code": 403,
  "message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup."
 }
}

I am using Firefox 69.0 on Mac OS X 10.14, and I tried to sign in again after clearing the cache, but the problem still happened. Is there something I could do on my local machine to fix this problem?

Thanks in advance.