NPE Error When Leaving the SPARQL View

What
Sometimes, an error occurs with the message 'Cannot read properties of undefined (reading 'getOntotextYasguiElement')'.

Why
In the 'getOntotextYasguiElement' function, we attempt to fetch the 'ontotext-yasgui-web-component' regardless of whether it is present or not.

How
Added a check to verify if the element is present before attempting to fetch it.

src/js/angular/core/directives/yasgui-component/yasgui-component-directive.util.js

@@ -26,7 +26,10 @@ export const YasguiComponentDirectiveUtil = (function () {
      * @return {YasguiComponent}
      */
     const getOntotextYasguiElement = (directiveSelector) => {
-        return YasguiComponentDirectiveUtil.getOntotextYasguiElementController(directiveSelector).getOntotextYasguiElement();
+        const ontotextYasguiElementController = YasguiComponentDirectiveUtil.getOntotextYasguiElementController(directiveSelector);
+        if (ontotextYasguiElementController) {
+            return ontotextYasguiElementController.getOntotextYasguiElement();
+        }
     };
 
     /**