The cache is not at the listed coordinates but the following should help to find it.
YKYBR XDBPP GRYGV YJGDK TJGVF BPNWV KBTPB WOKYJ HKVGQ WXSPE
KGVKV GFKFG KVGFK FGQWX SPEKG VQWXS PEKGV YKYBR XDBPP OKRYG
VHBPP TPBWO KYJHK VGFBP NWVKB

You can validate your puzzle solution with certitude.
.