Fix infinite spinner when converting odt triggers errors

www/common/outer/x2t.js

@@ -182,10 +182,18 @@ define([
                         + getToId(outputFormat)
                         + "<m_bIsNoBase64>false</m_bIsNoBase64>"
                         + "</TaskQueueDataConvert>";
+
+
             // writing params file to mounted working disk (in memory)
             x2t.FS.writeFile('/working/params.xml', params);
-            // running conversion
+            try {
-            x2t.ccall("runX2T", ["number"], ["string"], ["/working/params.xml"]);
+                // running conversion
+                x2t.ccall("runX2T", ["number"], ["string"], ["/working/params.xml"]);
+            } catch (e) {
+                console.error(e);
+                return "";
+            }
+
             // reading output file from working disk (in memory)
             var result;
             try {