A cache for the lovers of cryptography. The cache is not at the given coordinates. To find the cache you must decode the secret message. Use the hint. The difficulty rating is the summation of difficulties for solving and finding the cache.
TSFVH VOMXX MGIIO XFIFQ TJYIK IWIHV OYTHF GDVOM XXMPI PL
KEGVT YLRZC HJRGL JUYFV YGPKN XBKNG OYTHF GDVDI TXM
Extra hint in my maintenance log on 26/11/2017