Since yesterday I’m experiencing Transfer aborted: Instance not found when using portals to Oribos or Zereth Mortis or when I’m jumping to the Maw. Works when I try to enter second time.
The “Transfer Aborted” message is generally the result of trouble on the connection-level, but there are also a few addons that can trigger the effect (also via causing connection troubles, albeit indirectly).
More specifically: this occurs if, during the transit of a character from one zone to another, the realm-server recognizes stability issues in the data transfer between computer<->server. The transit is then intentionally interrupted, to avoid the character getting stuck in “limbo” - it is basically fail-save mechanism kicking in, to protect characters against becoming potentially inaccessible.
If this only occurs very rarely and doesn’t persist for more than maybe a few minutes it may be just a slight hiccup somewhere on the routing path towards the servers, but if this becomes a more regular event clearing out addons and optimizing the connection quality would definitely be good ideas. 
Thanks for the answer.
I did the full UI reset, deleted Interface, Cache and WTF folders. Running game with no addons. Also reseted my router and Flushed my DNS, renew my IP as well. All my drivers and Windows is updated.
Sadly nothing helped. I’m still getting Transfer Aborted messages. Also once when I was loggin in to the game I got the “Can’t connect to a voice chat server right now. Please try again.(VoiceError : 16)” error. Not sure is it related.
Both of these are likely related as they often occur as a result of connection issues. Is it possible you could test if this occurs under a different DNS such as googles.
One other option as this can be ISP level is to test if it occurs ounder another connection such as your phones LTE
Update:
I did more tests using Tethering and also I have Transfer Aborted errors. So, I think that’s not my connection issue. Will be appreciate for any suggestions what to do.
What else I did was a full UI reset, deleted Interface, Cache and WTF folders. That also not fixed it.
Same problem to me. I cannot enter any PVP BG or Arena, and i’ll be rewarded with a 5 min deserter flag.
…
Yes, there is pvp in the game…
I subscribed again just today so for the hell, pls…
Who is your ISP provider Dimension and what country are you from?
Yettel, Hungary 