Javascript error with new 2.6 DLL

Hello,
I am getting the following error when using the new 2.6 DLL, and the browser freezes when I continue. I use IE9.
Unhandled exception at line 1, column 107872 in http://localhost:16368/document-viewer/GetScriptHandler?name=GroupdocsViewer.all.min.js
0x800a138f - Microsoft JScript runtime error: Unable to get value of the property ‘getPageSize’: object is null or undefined
Thank you

Hello,

Unfortunately we were unable to reproduce this issue. Please provide more info about your environment and steps to reproduce the bug.

What example do you use? Is it the GroupDocsViewerWebformsDemo or you have a custom implementation?

When does this error appear? It rises on the start or you try to open some document, etc.?