The cache is NOT at the posted coordinates.
To solve this mystery, you must complete the
Christmas, Florida Adventure Lab
to obtain the coordinates to this cache.
If you haven't already, begin by downloading the new Adventure Lab app from Groundspeak. Once you have the app installed, search for the Christmas, Florida Adventure Lab.
Complete all 5 locations in the Christmas, Florida Adventure Lab and the coordinates will be available to you in the final journal.
When done with all 5 stops, go back to the title page and reread thru your journals to find the coordinates for this mystery cache.