I get an error when I create a product, category or manufacturer.

Hi.
I get an error when I create a product, category or manufacturer. After clicking on the add button, I get an error. New properties and characteristics are added without problems.

System.NullReferenceException: Object reference not set to an instance of an object.
   at Nop.Web.Areas.Admin.Factories.ProductModelFactory.PrepareProductModelAsync(ProductModel model, Product product, Boolean excludeProperties) in C:\andrei\nop_sources\src\Presentation\Nop.Web\Areas\Admin\Factories\ProductModelFactory.cs:line 861
   at Nop.Web.Areas.Admin.Controllers.ProductController.Create(Boolean showtour) in C:\andrei\nop_sources\src\Presentation\Nop.Web\Areas\Admin\Controllers\ProductController.cs:line 796
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

What nopCommerce version? Any third-party plugins or customizations? This should work in any clean version since it's the basic functionality.

Now everything is normal. The main store currency was not set.