diff --git a/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/Geoportal_HTML_Page.java b/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/Geoportal_HTML_Page.java
index bca482f..bdbc715 100644
--- a/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/Geoportal_HTML_Page.java
+++ b/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/Geoportal_HTML_Page.java
@@ -63,7 +63,7 @@ public class Geoportal_HTML_Page {
 				+ "        try {\n"
 				+ "          console.log(\"json response \" + response_object);\n"
 				+ "          if (response_object.state === \"OK\") {\n"
-				+ "            if (!(response_object.url === null || response_object.url === undefined)) {\n"
+				+ "            if (!(response_object.url === null) && !(response_object.url === undefined)) {\n"
 				+ "              window.location.replace(response_object.url);\n"
 				+ "            } else {\n"
 				+ "              setTimeout(() => {\n"