NOPcommerce bug fixes - API work

I need a skilled developer to fix shipping calculation errors on my NOPcommerce website. Additionally, I require additional features and improvements to be made along with bug fixes. The project is urgent and needs to be completed within 1-3 days. Ideal skills and experience for the job include:

- Experience with NOPcommerce
- Strong knowledge of API integration
- Expertise in payment processing
- Proficiency in debugging and troubleshooting
- Ability to work quickly and efficiently under tight deadlines

This is an excellent opportunity for a developer who is looking for a challenging project with a quick turnaround time. If you have the necessary skills and experience, please apply and provide examples of your previous work.


Bug log:
Value cannot be null. (Parameter 'value')
Full message:
System.ArgumentNullException: Value cannot be null. (Parameter 'value')
at Newtonsoft.Json.Utilities.ValidationUtils.ArgumentNotNull(Object value, String parameterName)
at Newtonsoft.Json.Linq.Extensions.Value[T,U](IEnumerable`1 value)
at Newtonsoft.Json.Linq.Extensions.Value[U](IEnumerable`1 value)
at Nop.Services.Shipping.ShippingService.GetDeliveryMinutesForSelectedAddress(String origin, String destination) in D:\a\1\s\Libraries\Nop.Services\Shipping\ShippingService.cs:line 277
at Nop.Plugin.Misc.OData.Controllers.OData.OrderMobileController.Checkout(IFormCollection form) in D:\a\1\s\Plugins\Nop.Plugin.Misc.OData\Controllers\OData\OrderMobileController.cs:line 450