after a few weeks of playing with iflix, let me share what i know or what i think i know about it...

.. it is auto detect on unifi or (streamyx), it does NOT need email/fb registration.
.. i had used diff dns's, does not seem to matter.
.. 5 devices are allowed to register, i.e. app installed, profile loaded.
.. only 2 devices allowed work at any one time.
.. works on ipad, should be same for all mobile phones and tablets.
.. works in smart tv's.
.. works on some android boxes, does not work on others.

.. common problems - "oops, embarrassing", ask for fb log in, email to register, blank screen, etc..

if the request to register pops up on one device, go to another one that works to delete device that is not working from the profile, wait 10 mins, then try again, i.e. re-register. it worked for me.

i assume u r tm customer, 1 yr foc...
yes, this issue is common, seen it before.

same box? did u use iflix in other devices?

i think it is due to the lag iflx has in determining how many devices u have installed iflix. if it exceeds the limit, it will block u this way. need to remove one or two, deregister, wait for it to clean out. time required... i have read 1 day, 1 week, 1 month, it's unclear!

the best way to deal with this is to deregister from all yr devices totally, start again. that's what i did, able to get two devices working again right after that.

If this is just happening on the Android TV box.... Launch iflix, if it still prompts you to login, restart your router and force-close or kill the iflix app...upon router bootup completion, restart the iflix app. It should auto-login. Usually a force-close or 2 fixes it.