Error 403 upon Authentication

Which provider is this for? Google, or Flickr, or Instagram, or SmugMug? Can you provide me with some screenshots? Have you set up the API keys and secrets appropriately?

1- for Google photos
2- Yes I set up the API keys correctly

You can check the screenshots here Authentication Error Screenshots

Thank you for this information. It looks like there is a conflict with a plugin here.

There is a workaround you can employ, though. Please follow the steps I have outlined in this post. Let me know if you face any issues.

I am getting this when I click to Authorize APIs.

400. That’s an error.

Error: redirect_uri_mismatch

The redirect URI in the request, https://developers.google.com/oauthplayground, does not match the ones authorized for the OAuth client. To update the authorized redirect URIs, visit: https://console.developers.google.com/apis/credentials/oauthclient/503817040632-8tdht7ad2rcagb9lm7oj0kbj0em0ulr7.apps.googleusercontent.com?project=5038170406

Google seems to have made a change to this since I originally posted the workaround… if you read the message on the right where you “Use your own OAuth credentials”, you will see this message:

You will need to list the URL https://developers.google.com/oauthplayground as a valid redirect URI in your Google APIs Console’s project.

So I am guessing, if you add “https://developers.google.com/oauthplayground” to your redirect URL list you should be fine. After you have finished the entire authentication process you can delete this URL.

I would like to thank you for being so helpful and professional. What an amazing plugin. Really I thank you so much!!

Thank you for you reply, @sayontan, in your previous thread (Can’t authorize Google Photos). I’m hanging in there, trying to make this work. I’ve added the “https://developers.google.com/oauthplayground” to my redirect URL list. Now Google is talking about scopes, referring to the list of API’s entered next to “Authorise API” in the Playground

400. That’s an error.

Error: invalid_scope

Some requested scopes were invalid. {valid=[https://www.googleapis.com/auth/photoslibrary.readonly, https://www.googleapis.com/auth/photoslibrary.sharing, https://picasaweb.google.com/data/%5D, invalid=[https://developers.google.com/oauthplayground], noncanonical=[https://picasaweb.google.com/data/(https://www.googleapis.com/auth/photos)]}

I’m obviously out of my depth here, unfortunately. I believe the issue may be my configuration details that I provided i the “OAuth consent screen”: the only items I need to add: Application Name (Photonic WordPress Plugin); choose a support e-mail address, and declare the “Authorized Domains”, correct?

Thank you

@dnrew,
As I mentioned on the other thread, please don’t post on threads marked “resolved” – apart from not being monitored, doing so also sends a notification out to the original poster, often without them wishing to be notified.

Now Google is talking about scopes, referring to the list of API’s entered next to “Authorise API” in the Playground

Indeed it is. What did you put in there? You should only have these three things, each separated by a space from the other:
https://www.googleapis.com/auth/photoslibrary.readonly https://www.googleapis.com/auth/photoslibrary.sharing https://picasaweb.google.com/data/

It looks like you have also pasted https://developers.google.com/oauthplayground there (this should only go to your redirect URLs).