Hi Erwin, I’ll give you more information:

On the development machine I always install only the design licenses for each component and unless in WebUi 2016 R1 something changed it works perfectly fine.

In Visual Studio 2015, after deleting the dlls IsNet from bin directory, I select add reference, in order to add the dlls for each WebUi component, afterwards I browse the new dll for WebUi 2016 and click add but VS doesn’t add the dll under bin directory. May be I should delete the project’s directory under:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files

What about installing side by side WebUi 2015 R1 and WebUi 2016 and after applying all changes remove WebUi 2015 R1?

Thanks for supporting me.

Regards.

Luciano

Hi Yudi, now the error 500.23 disappeared but I'm getting the following errors/problems:

MS IE 11 - see the attachment screenshot shown from the debbuger

Firefox 43.xx - the filter icons aren't displayed, only dots .... instead.

Moreover, using WebGrid designer I got the error: Intersoft componet Editor for VS 2012 is either not installed or corrupted. ...

I tried  solving the problem applying the solution found in the comunity date February 27,2013 but the error persists.

Attached web.config + debbuger screenshot.

Thanks.

Regards.

Luciano