Cache is, of course, not at the given coordinates. "No-solution logs" exclusively, or your log will be deleted.
The cache is named after Pinkie Pie, the My Little Pony pony, and the task has nothing to do with her what so ever, apart from her name being sorta 3.14'ish. Watching MLP will not in any way help you solve this task, but you may learn a thing or two about friendship. And magic. Both things, as well, rather irrelevant to solving this.