I have DotNetNuke Site, it showing teh below error.
System.Web.Configuration.ScriptingAuthenticationServiceSection cannot be cast to System.Web.Configuration.ScriptingAuthenticationServiceSection. Type A originates from 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' in the context 'Default' at location 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.Extensions\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.Extensions.dll'. Type B originates from 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' in the context 'Default' at location 'C:\Windows\assembly\GAC_MSIL\System.Web.Extensions\3.5.0.0__31bf3856ad364e35\System.Web.Extensions.dll'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code
From the error we can understand it is because of version change of System.Web.Extensions
We can fix the issue by changing single line on web.config.
Search for the line "<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>" on web.config and change it to as below:
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="4.0.0.0"/>
Thank you,
