Visual Studio Installation on server - A setup package is missing or damaged

Recently i am upgrading my Team Foundation Server (TFS) 2015 Update 2 and Release Manager 2015 Update 2 on my Windows Server 2008 R2 SP1. I hit the error while during the installation "A setup package is missing or damaged". I tried few solution from the net but no luck.

At the end, it solved by doing windows update about .net framework. So if you are facing the same issue, i would suggest:

1. Do all necessary windows updates.
2. Install latest .net framework.
3. Restart your server.

According to the MSDN page, one of the windows update package is required for windows server 2012.

Hope this helps.

Error: Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method.

I hit this error after i upgraded my ajaxtoolkits in my ASP.NET project.

Error: Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method.

Finally i found the quick solution from this site by taking off the Enabled="false" for tabpanel

OR

Another better solution is get the latest version of ajaxtoolkits from here