The cache is not at the listed coordinates but they are very important to solving the puzzle.
Sum of all possible paths is the most efficient, the probable path. Use the entire cosmos to generate all possible strings in a matrix of permutated plain texts. A universal guide will help generate the most probable path. It's obvious.
You will need to bring a writing instrument.
Good hunting.
Nfgeb'f abg tbvat gb yvxr guvf bar.