Quote Originally Posted by 'HelmoAlkou',index.php?page=Thread&postID=207164#p ost207164
A guildie I was helping in Hellfire got the same message. He 2-boxes and I was using three of my five. One of his toons got the message and couldn't continue to the next instance. He wrote a ticket and was told that it is a known bug and should be fixed soon. We ran all of them the next day w/o trouble. Note: that was last week before 6/2/09 patch.
This. I've also talked to a GM about it awhile back and this just said it was a bug and to give it about 5-10 mins which I did and everything was fine again. It was just something that happens every once in awhile. Although I have not had it happen in a long time and even when it did it was only when I was cutting it really close on the 5 per hour mark.

If it's still occurring to you just go grab a bite to eat or take a 5-10 min break and all should be fine again.