GetOrCreateCurrentOrder is throwing Object reference not set to an instance of an object

[warrentheranga]

A simple "Add To Cart" SurfaceController that was working fine 2 weeks ago now fails to run after jumping back in and firing up the project again.

Steps To Reproduce
Steps to reproduce the behavior:

1. Load up the product page, i.e. https://localhost:44309/store/products/test-product
2. Click on 'Add To Cart'
3. See the error

Expected behavior
The order should be created

Screenshots

NullReferenceException: Object reference not set to an instance of an object.
Umbraco.Commerce.Infrastructure.Resiliency.PollyExecutionStrategyBase.Execute<TResult>(Func<TResult> operation, Func<ExecutionResult<TResult>> verifySucceeded)
Umbraco.Commerce.Core.UmbracoCommerceUnitOfWorkProvider.Execute<T>(IUnitOfWorkOptions options, Func<IUnitOfWork, T> action)
Umbraco.Commerce.Core.UmbracoCommerceUnitOfWorkProvider.Execute<T>(Func<IUnitOfWork, T> action)
Umbraco.Commerce.Core.Session.SessionManager.GetOrCreateCurrentOrder(Guid storeId, string customerReference)
Umbraco.Commerce.Core.Session.SessionManager.GetOrCreateCurrentOrder(Guid storeId)
AtlasLogic.Core.Controllers.CartSurfaceController.AddToCart(AddToCartDto postModel) in CartSurfaceController.cs
+
                    var order = _sessionManager.GetOrCreateCurrentOrder(testStoreId)
lambda_method15373(Closure , object , object[] )
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()

Additional context
We are running Umbraco.Commerce.Checkout 13.1.0 project from Github - no change in several weeks

Umbraco Commerce version:
Umbraco.Cms 13.4.1
Umbraco Commerce 13.1.6

[mattbrailsford]

Linked to #565 please upgrade to Umbraco Commerce 13.1.10 and confirm if the issue is still present after the upgrade.

[warrentheranga]

Linked to #565 please upgrade to Umbraco Commerce 13.1.10 and confirm if the issue is still present after the upgrade.

Yes, confirmed working. Thank you

[mattbrailsford]

Just a heads up, 13.1.12 has been released which fixes some further regressions connected to the same issue so you may wish to upgrade when you have the chance.