remove the " between generic mod and last ".
Basically the last " " u put there. U dont need any “” in fact so remove them all.
Example:
C:\Steam\steamapps\common\ARK\ShooterGame\Binaries\Win64\ShooterGameServer.exe /Game/Mods/xxxx/Mod_01_UI?listen?ModId=xxxx QueryPort=27015?MultiHome=192.168.1.11?MaxPlayers=50?Port=7777?listen -nosteamclient -game -server -log