I was clearing ASP.NET Temporary Internet files and I accidentally deleted some files in framework folde. I have done it for 4.0. Now Visual Studio 2013 is not opening. When trying to run application set to 32 bit in app pool, an error in web.config appSettings, though appSettings was working normally before the deleting incident, appears.I don't know what went wrong and how to fix this. I am using Windows Server 2016. I tried with iis turn on or off in windows features. What we can do to restore.
HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.
The configuration section 'appSettings' cannot be read because it is missing a section declaration
the config file:
The problem is with the Visual Studio and IIS? Try to repair the installation of Visual Studio from Windows Control Panel. About IIS - there is a post regarding this - http://kb.act.com/app/answers/detail/a_id/22001/~/how-to-uninstall-and-reinstall-asp.net-from-the-command-prompt
cd %windir%\Microsoft.NET\Framework64\v4.0.30319 aspnet_regiis.exe –i
Maybe there are some problems with the .Net Framework itself, Microsoft made a tool to fix some common problems - https://www.microsoft.com/en-us/download/details.aspx?id=30135
If the repair of Visual Studio did not help, try to uninstall it, and the install again. There is also an old (and archived) program to help uninstalling Visual Studio - https://github.com/Microsoft/VisualStudioUninstaller/releases
I hope this helps!
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