The only way my friends have had any success is by running the Refresh Page script, because once you land on a confirm page (the green text) you're good to go, even if you landed on it and several hours passed it will still let you cross over.

Its guaranteed all my friends so far a pass over to Gungnir with no failure after 1 night of running it. I find it quite funny though that we have to resort to making apps just to ensure we get onto the server we want.