These are the three locations for Sly, I suspect you are on the third one. The last trail (Sly 3) of paw prints didn’t work for me either. I looked up the coords after the trail went dead.
/way 40.71 51.58 Sly 1
/way 38.03 39.73 Sly 2
/way 32.89 44.19 Sly 3