OAuthException code: 400, error_message: Invalid redirect

Am I setting up my Instagram social linking correctly?

Wanna make sure before I submit for review.

This is what I get on my address bar during Oauth Authrization;
https://www.instagram.com/oauth/authorize?client_id=318527649581537&scope=user_profile,user_media&response_type=code&language=en-us&redirect_uri=https://www.trulygourmet.co/en//SuperSocializerAuth/Instagram

Notice the double backslash that I bolded. Is that normal?

Here is a link of what I input in the Valid OAuth Redirect URIs;
https://ibb.co/CvTTm9S

Please help