Ask about fortitude
The breach indicated by Nada's apparatus is serious. While you may be able to mitigate its impact, I doubt it can be entirely reversed. However, the real test is the matter of reaching it. You will need to venture to the disturbed region by portal. I suggest you begin your journey by seeking out knowledge stones. Did you know they share a heritage with the ancient gateways? Approached with a clear mind and a steady hand, they may reveal the coordinates you require.