SPOILERS || Quest support

[Virida]

i'm folling ! this code  are absurde PXHLGLB, Q PCGL ALLW ECDTLO HQEP DLWOQWN XFE EPQD VLDDCNL QW PXYLD XM BLCRPQWN CWJ XFEYXDE DEQUU XYLBCEQXWCU.

(...)
carolXYLBCEQXWCUDEQUUXFEYXDECWJBLCRPQWNXMPXYLDQWVLDDCNLEPQDXFEDLWOQWNHQEPECDTLOALLWPCGLPXHLGLB <- contrary order

carol whit phonetic english word

all none

This is a simple substitution cypher.
You have to write out the regular alphabet and substitute it with the alphabet key. That way you get that C = A, A = B, R = C, O= D, L = E, the first letter being what the quest gives you, the second being the letter of the translation. So using the table from the FAQ you can translate the message. Top is the letter in your message, bottom the translation
click me for the table

Example for your code: PXHLGLB = However

ok i have check you table and confronting the first line with the second line how you have suggestion me, the result the translation of my letter are this message : however i have been tasked with sending out this message hopes of reaching any outpost still operational

But for the  password quest  not is  good
if  is PXHLGLB = However
q= i
and the code pcgl= have
allw= been
ecdtlo= tasked
hqep= with
dlwoqwn= sending
xfe= out
epqd= this
vlddcnl= message
qw=in
and other word.

wht is my error  now?
i has check  2 time, the  message are ok i have vrite well the word or have  fact an error??

You have forgotten the "in" in your message.
however I have been tasked with sending out this message in hopes of reaching any outpost still operational