Instagram Unable to reach callback URL

Question

I\'m having weird problem that instagram won\'t allow me to subscribe to more tags. I subscribed yesterday to 3 tags without any problem, I tried today with new tag and no e

Answer 1

I had the same issue when I wanted to register for a subscription.

Adding a AAAA record with the IPv6 of the server in the DNS of the domainname did the trick for me.