Since most of the letters are in the upper range of the alphabet let’s try Atbash
vcjchfffidmfcgchdheypdfgffdaci
There are a few “f” that seem to fit where numbers would be in the passcode. Let’s convert letters to numbers using a=0
21 2 9 2 7 5 5 5 8 3 12 5 2 6 2 7 3 7 4 24 15 3 5 6 5 5 3 0 2 8
Make pairs
21 29 27 55 58 31 25 26 27 37 42 41 53 56 55 30 28
Range is off for decimal to Ascii but the number position are all in the 50 range. We used Atbash as the first step, let’s Atbash those numbers (1=9)
89 81 83 55 52 79 85 84 83 73 68 69 57 54 55 70 82
Convert decimal to Ascii
YQS74OUTSIDE967FR