When I try to open 'https://{site}/_layouts/15/AppRegNew.aspx', in order to generate an access token to authorize REST API calls to the SharePoint site to retrieve data and manipulate the site data, I get the below message even though I have admin access:
Sorry, you don't have access.
So, Are there any other ways to generate access token other than the steps mentioned here.
Or Is there any extra permission needed to get access to this page? or do we have to change any settings to get this access?