This cache is NOT at the posted coordinates!
The Vatsyayana cipher is a simple substitution cipher. Character pairs are formed and used to encrypt the text by direct substitution of the pairs.
wyqdxdxqvvdnydxqvvwbwvvblxdwbwvdny
nvcdywvywvzymqdnycbhcvevwywvywv
J-P B-I O-Y H-X W-N A-K C-S R-Q U-M Z-F E-V G-L T-D
You can validate your puzzle solution with certitude.