Commented Issue: Can't use toolkit after nuget update [27372]

I used Nuget to update an existing project to the latest version of the tookit newVersion="4.1.7.123". After the update I made a blank page and tried to drop a toolkitscriptmanager on it and it does not work. The tabs show up OK on another page but it will not let me add extenders to the text fields.

So I deleted the ajax control tool kit saved the project closed it and reopened it. The I used Nuget to reinstall the tookit. Still the same problem.

Any idea how to fix this?
Comments: Current version of AJAX Control Toolkit (v15.1.2) works fine. Try upgrading to it. Check out [this getting started video](https://www.youtube.com/watch?v=24hIhS2itUU&feature=youtu.be) for more information.