🐛 [Frontend] Fix: File Picker's getOutput helper (#8683)

Author: odeimaiz

services/static-webserver/client/source/class/osparc/file/FilePicker.js

@@ -66,7 +66,8 @@ qx.Class.define("osparc.file.FilePicker", {
   statics: {
     getOutput: function(outputs) {
       const output = outputs.find(out => out.getPortKey() === osparc.data.model.NodePort.FP_PORT_KEY);
-      return output.getValue();
+      // output can be undefined
+      return output ? output.getValue() : null;
     },
 
     getFilenameFromPath: function(output) {
@@ -231,9 +232,7 @@ qx.Class.define("osparc.file.FilePicker", {
           });
       } else if (osparc.file.FilePicker.isOutputDownloadLink(node.getOutputs())) {
         const outFileValue = osparc.file.FilePicker.getOutput(node.getOutputs());
-        if (osparc.utils.Utils.isObject(outFileValue) && "downloadLink" in outFileValue) {
-          osparc.utils.Utils.downloadLink(outFileValue["downloadLink"], "GET", outFileValue["label"], progressCb, loadedCb);
-        }
+        osparc.utils.Utils.downloadLink(outFileValue["downloadLink"], "GET", outFileValue["label"], progressCb, loadedCb);
       }
     },