Fortnite: Decryption Challenge, chip 50: Search at night in a ruined castle on top of a mountain

Players who have purchased the Season 9 Battle Pass will need to look for chip 50 in the north of the map, near Haunted Hills, in order to complete the hidden image of the Decryption challenge. Since May 9, when Season 9 kicked off, a new type of challenge has appeared alongside those offered for free or in the Battle Pass. Effectively, all players who have purchased the Battle Pass for this new season have access to a challenge called Decryption in which an image is hidden by 100 computer chips. To discover it, they will therefore have to go in search of these chips by completing various challenges such as reaching a specific level, obtaining a certain number of EXP, etc. 

As the developers stated, 36 decryption chips can already be obtained on the occasion of the arrival of Season 9, but thereafter at least one new chip will be unlocked every day at 15 p.m.

To get chip 50, you will have to go to the northwest of the map, near Haunted Hills. To the east of the graveyard town, you'll find a huge mountain on which rests a ruined castle, an area that appeared during the 2018 Halloween events and has, more or less, gone downhill since then. The chip is located on the northwest tip, under a dilapidated floor and a few centimeters from a wooden coffin. This is where you will find the chip, however, you could only retrieve it if it is dark.
  When the chip is collected, it will then be necessary to go to the Challenges tab then Decryption and press box 50 to discover a piece of this hidden image.