more testing

src/designviewer.cpp

@@ -340,7 +340,7 @@ void DesignViewer::showAppWindow()
     // qtloader API. This needs to be done on delay after initial setup to make
     // sure qtloader is initialized.
     QTimer::singleShot(0, [&]() {
-        emscripten::val instance = emscripten::val::global("instance";
+        emscripten::val instance = emscripten::val::global("instance");
         if (instance.isNull()) {
             qCritical()<<"instance is null";
             return;