We publish a book and and sell the book and online course on our website. However, whenever someone tries to buy anything from our online store, they get an error message stating, Oops. An error has occcured. The error has been logged. If the problem persist, please contact us. It occurs when the user clicks on the Shipping Method step. Can anyone help??? Here is the message in the error log:
System.NullReferenceException: Object reference not set to an instance of an object.
at MettleSystems.dashCommerce.Store.Services.TaxService.TaxService.LoadProviders() in C:\mettlesystems\code\open source\dashCommerce\Store\Services\TaxService\TaxService.cs:line 199
at MettleSystems.dashCommerce.Store.Services.TaxService.TaxService..ctor() in C:\mettlesystems\code\open source\dashCommerce\Store\Services\TaxService\TaxService.cs:line 107
at MettleSystems.dashCommerce.Store.OrderController.CalculateTax(String userName) in C:\mettlesystems\code\open source\dashCommerce\Store\Controllers\OrderController.cs:line 502
at MettleSystems.dashCommerce.Web.paypalcheckout.btnShippingMethod_Click(Object sender, EventArgs e) in C:\mettlesystems\code\open source\dashCommerce\Web\paypalcheckout.aspx.cs:line 370