The cache is not at the posted coordinates.
I have solved puzzles like this before and have always enjoyed the challenge they provide. I thought I would make it just a little easier for you by providing a theme. Each letter of the alphabet is used only once and none of the words start or end with the missing letter. Once you have finished, you may enter your solution into the checker. Enjoy!
rstor_oisep
jorph_enado
blrge_glefm
ocorm_rantg
bruso_lernp
frglo_trich
merac_oonds
posku_kther
yeago_times
mopre_ndeer
fechi_nalle
pwedo_phinx
opegr_thmos
ischa_eleon
lifer_etion
edgwa_billo
sobea_ertif
poeze_range
kinka_ouler
gobuf_alogo
wenvi_erere
belep_anter
kosna_elnes
smaca_ueore
qurga_elled
mnodi_uanat
You can validate your puzzle solution with certitude.