This kind of Error will mainly come for Newtonsoft.json.dll version Conflict.
Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference
You can see the Exception trace it is showing the configuration file settings.
We can check the version of dll in the runtime of web.config file and dll version in the Solution references.
<assemblyIdentity name="Newtonsoft.Json" culture="neutral"publicKeyToken="30ad4fe6b2a6aeed" />
<bindingRedirect oldVersion="0.0.0.0-126.96.36.199" newVersion="188.8.131.52" />
Either we have to change the version in configuration section or we have to update of dll based on the dependencies of version.
Update the Nu Get package from Package update Console.
Go to Tools in Visual studio and select Nu Get Package Manager and the select Package Manager Console.
This will resolve the Problem.