NOPcommerce API work + bug fixes

I am looking for a skilled freelancer who can help me with my NOPcommerce project. I need assistance with implementing and modifying Order API endpoints as well as identifying and fixing bugs. The ideal candidate will have experience with NOPcommerce and API development. The timeline for completing the project is urgent, within 1-3 days.

Skills and Experience Required:
- Preferred developer from Australia or the Philippines!
- Experience with NOPcommerce development and API implementation
- Strong knowledge of Order API endpoints
- Ability to identify and fix bugs
- Attention to detail and ability to work within a tight deadline.


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