You could try converting to morse and figure what it all means but if you count the characters in the string it comes up to 120. 120 divided by 8 is 15 which makes it a good candidate for binary. Make groups of 8 and convert dots to 0 and dashes to 1

Convert binary to Ascii

nkc77field764hc

Start with Atbash

iiivxxlciiivxldiiilccdvxxcccdvxlmcivxlccdiivxlcdvxdiiixxxliiivcxccd

We now have roman numerals, reverse the string

dccxcviiilxxxiiidxvdclxviidcclxvicmlxvdcccxxvdccliiidlxviiiclxxviii

Split to have valid roman numerals and convert them to decimal.

Make sure to put the leading 0 on the second value (83).

Make pairs

79 80 83 51 56 67 76 69 65 82 57 53 56 81 78

Convert decimal to Ascii

OPS38CLEAR958QN

Reverse the string

fcoasifiarueisisdjsi

When making a rectangle you can almost see the keyword aura put the rest doesn’t work. Change the 2 letter numbers to numbers first

fcoa65aru86sdj6

Make a 3×5 grid

Read left from the upper right O

ocf56auras686jd