About the Puzzle #3 (L'Atelier door)

Mysterious Contact Puzzle #3 (L'Atelier door)
#1

Anything related to puzzle#3, L’Atelier door

#2

I played the game and got the square and thought the numbers were 62, 12, 43, 26 and 57! No matter what I try, “nothing happened”. I need some help please!

#3

I had the wrong solution - all good now!