How many days for instagram review a sandbox app to go live, i submited all required documents including youtube URL (function interactive video), privacy policy and the my website url links to facebook fanpage (have no offical website). It's been a week i submited and review still pending.
Recently Instagram has stopped accepting submissions of new apps, That is the reason you are facing this problem to create new access token. https://techcrunch.com/2018/04/02/instagram-api-limit/ Although for the already registered app, you can still get more access token by adding the additional new users.