How to fix error: The message received from the server could not be parsed

Question

We have a Sharepoint solution that uses AJAX. The button that triggers this is inside an update panel.

One of the things that we do is generate a MS Word document, t

Answer 1

Try adding script manager in your page load, like this:

((ScriptManager)Master.FindControl("ScriptManager1")).RegisterPostBackControl(btnExport);