The cache is NOT at the posted coordinates.
ABBABABBBABAAABBAABBAABBBBAABBAA
BBBABAAABAAABBAABBBBAAABAABBBABB
AABBBAAAABBAABAAAABBABAAABAABAAA
ABAABAABAAABABABBBABAAABBAABBBBA
AAABBBBABBBAABAAAABBABBAABBBBAAB
AABAABAAABABBBAAABABABBBABABAABA
AABAABABABBBABABAABAAABBABBAAABA
ABAABABAABBABBBAABBABAABAAAABBBB
ABAAABBABAAABBBAAABAABAAAAABBAAB
ABABBBABABAABAAABBAABBAABAAAABAA
ABBABAAABBAABAAAABBABAAABAABAAAA
BAABAABABAABBAABBBABAAABAAABBAAB
BBBAAABAABAAABAABABABAABAAABBABA
BBBBABBBAABAAAABBABBAABBBAABBAAB
BBBAAABAABAAAABAABAABBAABBBBAAAB
AABAAAABAABAABAABAAABABBB
Remember: you don't win friends with salad.
You can validate your puzzle solution with certitude.