I have run into this error since deploying my Merchello/Fastrack 2.3.0 website onto our dev server. The exact same version works on my local machine. Any help much appreciated!

Server Error in '/' Application.

Value cannot be null.
Parameter name: merchelloContext 
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

 Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: merchelloContext

Source Error: 

Line 89:                         <a href="@basketPage.Url">
Line 90:                             <i class="fa fa-shopping-cart"></i>:
Line 91:                             <span data-muilabel="basketcount">@CurrentCustomer.Basket().TotalQuantityCount</span> item/s
Line 92:                         </a>
Line 93:                     }

 Source File:  e:\PAMData\Sites\Clients\NourishingSouls\wwwroot\Views\Site.cshtml    Line:  91