Unfortunately from this snapshot I cannot tell for sure what is disabling the AppBuilder
extension from installing. You can expand the details section in the message to see if the information available there can shed more light on the issue. You can also check the Event Viewer
on your machine, if it has detected the crash, the log might contain more information about its cause.
In order for us to investigate this report further, we will need more information about the setup of your machine - OS type and version, .Net version, Visual Studio version, installed Visual Studio extensions. These details can help us better understand the context in which the issue occurs and suggest possible solutions.
If you have downloaded the AppBuilder
extension from the Telerik Platform portal, then you can try downloading and installing the extension through Visual Studio Tools->Extensions and Updates
. You can also try installing a different Visual Studio extension to ensure that your development machine allows an installation of extensions.