I am currently trying to attach a custom tab to a page. I do this by calling https://www.facebook.com/dialog/pagetab?app_id={my_app_id}&redirect_uri={my_tab_landing}
This results in a error:
Sorry, something went wrong.
We're working on getting this fixed as soon as we can.
Its in this state for 2 days now, anyone else having the same issue?