bugfix possible url exception

Author: nleush

lib/loader/pluginLoader.js

@@ -500,7 +500,7 @@
     };
 
     export function getDomainForPlugin(uri) {
-        return uri && uri.split('/')[2]
+        return (uri && uri.split('/')[2] || '')
             // Skip www. for domain search.
             .replace(/^www\./i, "")
             // Skip tailing ? for `domain.com?query`