Where are you seeing the error for authentication failure?
Web browser: vivaldi
Website: pastorijtuinbertem.be
Via Photonic -> Authentication: Google Photos -> step 1: Authentication
Log in with Google
Access blocked: This app’s request is invalid.
[email protected]
You can’t log in because this app sent an invalid request. Please try again later or contact the developer regarding this issue. Learn more about this error
If you are the developer of this app, view the error details.
Error 400: redirect_uri_mismatch
You can’t sign into the app because it doesn’t comply with Google’s OAuth 2.0 policy.
If you are the app developer, register the redirect URI in the Google Cloud Console.
Request details: redirect_uri=https://www.pastorijtuinbertem.be/wp-admin/admin.php?page=photonic-auth&source=google
You have specified in your app configuration in Google that your redirect URI is https://pastorijtuinbertem.be/wp-admin/admin.php?page=photonic-auth&source=google, but when you are making the request, you are making it from https://www.pastorijtuinbertem.be/wp-admin/admin.php?page=photonic-auth&source=google. Basically, your site has a “www” in front of it (maybe your domain registrar has set it up to automatically add “www”), but you have configured your redirect URI without the “www”. That is causing the mismatch.
You can add another entry to the redirect URI list with https://www.pastorijtuinbertem.be/wp-admin/admin.php?page=photonic-auth&source=google, which should take care of this.