Welcome to the RingCentral Community

I am trying auth code flow and I got "Login error Error: Authorization code was not issued for this application" although the app is browser-based so the auth code flow should work.

However, I was still getting some code as you can see so I tried to get access token with it but I got

{
  "error" : "invalid_grant",
  "errors" : [ {
    "errorCode" : "OAU-108",
    "message" : "Authorization code is expired"
  } ],
  "error_description" : "Authorization code is expired"
}

What should I do?