The cache is NOT at the posted coordinates. This is a bonus cache for completing the Adventure Lab, Ayr: Back in Time.
To find the actual coordinates for this cache, you will need to complete the Adventure Lab, Ayr: Back in Time. Navigate to each of the five locations in the Adventure Lab and correctly answer a question at each location. You will find the required letters for this bonus cache in the journal entries of the Adventure Lab.
The letters form a word. Enter that word into the checker.
You can validate your puzzle solution with certitude.