Configuration Error

I upgrade successfully from Litium 6 to Litium 7, and i get this error when i star litium site
Could not load file or assembly ‘System.Runtime, Version=4.1.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. The system cannot find the file specified.

How can i fix it?

Litium version: [upgrading from 6 to 7]

Try to remove the bindinRedirect in web.config and test.
Also check the version of the System.Runtime on the reference/properties to check if you got the right verion.

I did but dose not work. Here is log msg:
LOG: This bind starts in default load context.
LOG: Redirect found in application configuration file: 4.0.10.0 redirected to 4.1.2.0.

Make sure you got same assembly version number for System.Runtime on all projects in your solution and check the version number in the csproj file also.

Try to clean out all binding redirects, build the solution and correct the binding redirects with the message in error pane. See binding redirects on https://docs.litium.com/documentation/upgrading-to-litium-7