moved boot query to connectcallback

extapp/js/rolescontroller.js

@@ -16,14 +16,14 @@ class ExtAppRoleController extends HTMLElement{
     
     constructor(){
       super()
-      this.#boot = document.querySelector("d4s-boot-2")
-      this.#serviceurl = this.#boot.url
       this.attachShadow({ mode: "open" });
     }
 
     connectedCallback(){
       this.#appid = this.getAttribute("appid")
       this.#groupid = this.getAttribute("groupid")
+      this.#boot = document.querySelector("d4s-boot-2")
+      this.#serviceurl = this.#boot.url
       if(!this.#loading){
         this.#loading = true
         this.loadData()