The cache container is not located at the posted coordinates. Solve the puzzle to get the coordinates.
Another new puzzle type! When you have assigned all the letters, you will see that the first letters in numeric order form a valid What3Words address. Because W3W is not working right now, enter the three words with only spaces between into Certitude to get the final coordinates.
To make this first one a little easier I have given you a couple of letters for free!
You can validate your puzzle solution with
certitude.