I've been spamming the horseman queue to get all the rings and I reached the 10 instance limit. I queued, joined, and the game wouldn't let me port into the instance.

I noticed SavedInstances recorded none of the previous runs.

21:25 You have entered too many instances recently.
21:25 SavedInstances: Warning: You've entered about 0 instances recently and are approaching the 10 instance per hour limit for your account. More instances should be available in n/a.
21:25 You have entered too many instances recently.
21:25 SavedInstances: Warning: You've entered about 0 instances recently and are approaching the 10 instance per hour limit for your account. More instances should be available in n/a.
21:26 You have entered too many instances recently.
21:26 SavedInstances: Warning: You've entered about 0 instances recently and are approaching the 10 instance per hour limit for your account. More instances should be available in n/a.