Service Address Scheme Error

You encounter the following error message when opening the coding service URL in your browser:
ServiceActivationException:
The service '/PostCodingService/PostCodingService.svc' cannot be activated due to an exception during compilation. The exception message is:
This collection already contains an address with scheme http. There can be at most one address per scheme in this collection. If your service is being hosted in IIS you can fix the problem by setting 'system.serviceModel/service

Add the following into the web.config file of the coding service application:

<system.serviceModel>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
    </serviceHostingEnvironment/>
</system.serviceModel>