JavaScript runtime error: Unable to get property 'prototype' of undefined or null reference

GroupDocs.Viewer Product Family
1

The undefined or null reference is the $.ui.groupdocsViewer object. My Jquery and JqueryUI references are in place. Are there any common mistakes that would cause this error?

This is an MVC project using VS 2013.

2

Hello Mark,

We are sorry to hear that you have this issue. Unfortunately we cannot solve this issue without additional details. Please give us:
1. Source code of the GroupDocs.Viewer widget.
2. Source code of the HEAD block, where GroupDocs.Viewer script load block (@Html.CreateViewerScriptLoadBlock()) is situated.
3. Screenshot of the error.

Also please make sure that there is no conflict between scripts, included via @Html.CreateViewerScriptLoadBlock(), and other scripts, which are present on the page. In particular, when specifying @Html.CreateViewerScriptLoadBlock(), GroupDocs.Viewer includes jQuery, jQuery UI and Knockout.js to the page. And if you’re specifying the same JavaScript libraries, there may be a conflict.

Thanks and waiting for your reply.