Perform the server code check inside of the server listings population. No code, no show.

app/assets/js/scripts/overlay.js

@@ -267,6 +267,12 @@ function populateServerListings(){
     const servers = distro.getServers()
     let htmlString = ''
     for(const serv of servers){
+        if(serv.getServerCode() != null && serv.getServerCode() === ''){
+            if(ConfigManager.getServerCode() !== serv.getServerCode()){
+                // skips any servers which the player hasn't got the code to access
+                continue
+            }
+        }
         htmlString += `<button class="serverListing" servid="${serv.getID()}" ${serv.getID() === giaSel ? 'selected' : ''}>
             <img class="serverListingImg" src="${serv.getIcon()}"/>
             <div class="serverListingDetails">