Asus Router is blocking Roku / TV and Android app for Netflix

So - I moved from a Netgear to an Asus Router and it stops me from accessing Netflix from Roku (error NW-2-5) ...or from Android App... (1001 error).

I assume it is a setting somewhere in the router to unblock it - but wonder if anyone elese experienced this and know how to fix it.

Thanks for your help.

Kind regards
Massi