You need level 90 char from STORMSCALE EU to invite you.
Now you have CRZ completely disabled and every zone you enter is your own realm and you can see all NPC´s.
Stormscale had some CRZ issues earlier so obviously they disabled it completely for moment.
Get those rares.
If your friend cannot see the invite and you will get "declined" messaged instantly you need to add him to your btag first.
Tested just and this works with level 1 on some realms!
FIXED