Additional instances cannot be launched

Someone can do with this: additional instances cannot be launched
I try in last week 3 times create group and do AQ40, but all the time got "additional instances cannot be launched" after 60 minutes trying ppl leave raid....
Someone can tell me when possible do AQ40?
I try 7:00am nothing, i try 23:00 nothing i try at weekend sunday 14:00 NOTHING!!
How enter to this instance?

Server: EONAR