Permission level cannot be found. at Microsoft.SharePoint.SPRoleDefinitionCollection.get_Item(String name)
This message happend when you try set permission to user in sharepoint by code with rong spelling.
Such us: you want set "Contribute" for the user, but you write it: "Contributer".
This message happend when you try set permission to user in sharepoint by code with rong spelling.
Such us: you want set "Contribute" for the user, but you write it: "Contributer".