After installing a new Core, users are unable to enter the Core license key (or, if they key was entered, users are unable to create a new repository).
The following error also appears in the web browser:
“Method not found: ‘Int32 System.Web.Util.AppSettings.get_MaxJsonDeserializerMembers()’.”
This error may be the result of issues within .Net 4.0.
To resolve this issue, complete the following steps.