OAuthCallbackError on Dropbox

Provider type

Dropbox

Environment

System:
OS: Windows 10 10.0.19044
CPU: (12) x64 AMD Ryzen 5 3600 6-Core Processor
Memory: 5.36 GB / 15.93 GB
Binaries:
Node: 18.12.1 - C:\Program Files\nodejs\node.EXE
Yarn: 1.22.4 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 9.6.5 - C:\Program Files\nodejs\npm.CMD
Browsers:
Edge: Spartan (44.19041.1266.0), Chromium (114.0.1823.82)
Internet Explorer: 11.0.19041.1566

Reproduction URL

Private

Describe the issue

Whenever I try to log in with the Dropbox provider I get this error:

[next-auth][error][OAUTH_CALLBACK_ERROR] 
https://next-auth.js.org/errors#oauth_callback_error expected 200 OK, got: 404 Not Found {
  error: OPError: expected 200 OK, got: 404 Not Found
      at processResponse (webpack-internal:///(sc_server)/./node_modules/openid-client/lib/helpers/process_response.js:37:15)
      at Client.userinfo (webpack-internal:///(sc_server)/./node_modules/openid-client/lib/client.js:1110:22)
      at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
      at async oAuthCallback (webpack-internal:///(sc_server)/./node_modules/next-auth/core/lib/oauth/callback.js:136:23)
      at async Object.callback (webpack-internal:///(sc_server)/./node_modules/next-auth/core/routes/callback.js:18:79)
      at async AuthHandler (webpack-internal:///(sc_server)/./node_modules/next-auth/core/index.js:202:38)
      at async NextAuthRouteHandler (webpack-internal:///(sc_server)/./node_modules/next-auth/next/index.js:49:30)
      at async NextAuth._args$ (webpack-internal:///(sc_server)/./node_modules/next-auth/next/index.js:83:24)
      at async eval (webpack-internal:///(sc_server)/./node_modules/next/dist/server/future/route-modules/app-route/module.js:253:37) {
    name: 'OAuthCallbackError',
    code: undefined
  },
  providerId: 'dropbox',
  message: 'expected 200 OK, got: 404 Not Found'
}

The issue might be on the token URI https://api.dropboxapi.com/oauth2/token which if access with GET method it returns a 404, but with POST it works fine

How to reproduce

Use dropbox provider

Expected behavior

There should not be an error

Start with the OAuth callback path shown in next-auth/core/lib/oauth/callback.js and the Dropbox provider configuration, then inspect how openid-client requests the token and userinfo endpoints. Reproduce the Dropbox login and verify that the callback completes without the 404 OAuthCallbackError.