I’m running into a weird problem with my OAuth2 setup. My backend gets the data just fine, but nothing shows up on the frontend side.
The backend throws this error message:
“You are receiving this error either because your input OAuth2 scope name is invalid or it refers to a newer scope that is outside the domain of this legacy API. This API was built at a time when the scope name format was not yet standardized. This is no longer the case and all valid scope names (both old and new) are catalogued. Use that webpage to lookup (manually) the scope name associated with the API you are trying to call and use it to craft your OAuth2 request.”
What I’ve already done:
- Double-checked my OAuth2 scopes against Google’s official documentation
- Confirmed backend API calls return proper data
- Inspected network requests in browser dev tools (data is there)
- Verified response contains expected information
- Ruled out CORS configuration problems
My setup:
- Backend: Python
- Frontend: JavaScript
- Console shows some errors but nothing obvious
Main questions:
- Is this scope issue preventing frontend data display?
- What’s the best way to debug frontend data handling?
- Any other debugging approaches I should try?
Really stuck on this one and could use some guidance!
hmm that error message sounds like a google api thing - are you maybe using an old oauth library or deprecated scopes? also curious what those console errors actually say, even if they seem unrelated they might give us a clue about whats breaking the data flow?
yeah, it seems like your frontend might be missing the token during requests. make sure you’re including the oauth token in the headers correctly. check the auth flow too, just to be sure it’s all good on that end!
The disconnect between successful backend data retrieval and frontend display typically indicates a state management issue rather than the OAuth scope error itself. Since your backend is functioning correctly, focus on how your frontend handles the authenticated response data. Check if your frontend is properly updating its state after receiving the data - common issues include asynchronous timing problems where components render before data arrives, or state not being propagated correctly through your application. Examine your data binding and ensure the frontend variables are actually being updated with the received data. The OAuth scope warning might be causing authentication to work intermittently, so consider updating to the current scope format as suggested in the error message, but the primary issue likely lies in your frontend data handling logic.