I read this

Configuring Roster (*ROSTERDIR*/admin/config.php)

Copy your guild and server name directly from CharacterProfiler.lua
This is especially important if you have characters with accent marks on them
Also, all names are case sensitive. "Feathermoon" is not the same as "feathermoon"
This is mentioned in the comments, but is often overlooked

is this done in the panel? or on the actual file? and in the file where do I put this?

In the Roster Config page, subsection "Guild Settings"