Make a 6×3 grid

You can almost make out the keyword in the middle. Reverse the middle row

Read going down from the upper left P

prw57campbell252ow

Rot, Atbash, Morse, Rectangle and a few other ciphers didn’t give anything. We have 20 characters and we know that we need at least 10 for prefix and suffix. Let’s split the string in two

nxzehgfgfe
kfhmtgltzw

On the first string, aside from the 3 letters at the start, they could all be converted to numbers. Let’s assume this is the prefix and suffix, we would get

nxz47656fe

Now we need to find the keyword that is hidden in the second string. Let’s try vigenere.

Passphrase: nxzehgfgfe

Message: kfhmtgltzw

Result: xiiimagnus

nxz4713magnus656fe

Don’t waste time trying to translate those characters. Look at them carefully and you can start making out letters of the alphabet

yvr93tsukasa355so