Alexa and windows based media server



Hi im new to plex and would like to know if the media sever has to have a wifi connection to work with plex?
my set up: amazon echo dot
Windows 10 bases pc acting as plex server ( wired connection)
player installed on Android tv . (wired connection)

the player works fine communicating with the server but when i ask alexa to open plex i here a message i cannot communicate with your plex server right now. although the player can. using tv remote
Ive enable plex skill.

any help would be appreciated.