diff --git a/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/HTML_Page.java b/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/HTML_Page.java
index 48ffb88..bac2647 100644
--- a/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/HTML_Page.java
+++ b/src/main/java/org/gcube/datatransfer/resolver/geoportal/exporter/HTML_Page.java
@@ -13,6 +13,7 @@ public class HTML_Page {
 	public static String entityHTMLMessage(String action, String message, boolean waiting, String viewPdfURL) {
 
 		String newHTML = "<html>\n"
+				+ "\n"
 				+ "  <head>\n"
 				+ "    <meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">\n"
 				+ "    <style>\n"
@@ -48,18 +49,17 @@ public class HTML_Page {
 				+ "    <script type=\"text/javascript\">\n"
 				+ "      async function fetchPDF_URL() {\n"
 				+ "        try {\n"
+				+ "\n"
 				+ "          const response = await fetch('"+viewPdfURL+"');\n"
 				+ "          console.log(\"polling response\");\n"
 				+ "          return response.json();\n"
 				+ "        } catch (error) {\n"
-				+ "          console.error(\"polling errro: \" + error);\n"
+				+ "          console.error(\"polling error: \" + error);\n"
 				+ "        }\n"
 				+ "      }\n"
 				+ "      async function playPDFPoll() {\n"
 				+ "        const response_object = await fetchPDF_URL();\n"
-				+ "        console.log(\"response is: \" + response_object);\n"
-				+ "        let isJsonResponse = isJsonString(response_object);\n"
-				+ "        if (isJsonResponse) {\n"
+				+ "        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"
@@ -72,8 +72,9 @@ public class HTML_Page {
 				+ "          } else {\n"
 				+ "            showError(response_object.messagge);\n"
 				+ "          }\n"
-				+ "        } else {\n"
+				+ "        } catch (error) {\n"
 				+ "          console.log(\"no json response \" + response_object);\n"
+				+ "          console.log(\"error \" + error);\n"
 				+ "          showError(\"Error when exporting PDF :-(\");\n"
 				+ "        }\n"
 				+ "\n"
@@ -84,17 +85,10 @@ public class HTML_Page {
 				+ "        inner_div.innerHTML = error_msg;\n"
 				+ "      }\n"
 				+ "\n"
-				+ "      function isJsonString(str) {\n"
-				+ "        try {\n"
-				+ "          JSON.parse(str);\n"
-				+ "        } catch (e) {\n"
-				+ "          return false;\n"
-				+ "        }\n"
-				+ "        return true;\n"
-				+ "      }\n"
 				+ "    </script>\n"
 				+ "    <title>D4Science Geoportal - Action</title>\n"
 				+ "  </head>\n"
+				+ "\n"
 				+ "  <body onload=\"playPDFPoll()\">";
 		
 		newHTML += "<img alt=\"D4Science Logo\" src=\"https://services.d4science.org/image/layout_set_logo?img_id=32727\"><br />";
