Error calling a service through Serviceclient in C#

Question

I have a part in the project (MVC that connects to BD through web services) of my company that calls WCF services this way:

public static ReturnType CallWebMethod<TService, ReturnType>(String endpointConfigurationName, String myMethod, object[] parameters = null)
    where TService : class
    {
        var client = new ServiceClient<TService>(endpointConfigurationName);

        // Get a type from the class 
        Type type = client.Proxy.GetType();

        // Retrieve the method you are looking for
        MethodInfo methodInfo = type.GetMethod(myMethod);

        ReturnType result;
        bool success = false;
        try
        {
            // Invoke the method on the instance we created above
            result = (ReturnType)methodInfo.Invoke(client.Proxy, parameters);
            if (client.State != CommunicationState.Faulted)
            {
                client.Close();
                success = true;
            }
        }
        finally
        {
            if (!success)
                client.Abort();
        }

        return result;
    }

I downloaded the project from the repository (the project in the repository is the final version that is in production) and have received the error Object Reference not set to an instance of an object because of the methodInfo, which is null. I supposedly send the service name and the method name, both valid (work in production), but he can’t find them.

I make the call like this:

return ServicesHelper.CallWebMethod<BusinessServicesImplementation.IBusinessOportunitiesService, bool>
             ("BusinessServicesImplementation.BusinessOportunitiesService", "SyncUpGpc_Aiccopn_Users_and_Companies", par);

What can I do to try to identify the problem?