message: fix: null exception
diff: @@ -92,7 +92,7 @@ export default class RosterItem {
  avatar.addElement(this.element.find('.jsxc-avatar'));
  this.contact.registerHook('name', (newName) => {
  - this.element.attr('data-name', newName.toLowerCase());
  + this.element.attr('data-name', newName?.toLowerCase());
  this.element.find('.jsxc-bar__caption__primary').text(newName);
  });
  