Order.API project Mediator error solved.

src/Services/Ordering/Ordering.API/Application/Behaviors/LoggingBehavior.cs

@@ -1,5 +1,5 @@
 namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Behaviors;
-public class LoggingBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
+public class LoggingBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse> where TRequest : IRequest<TResponse>
 {
     private readonly ILogger<LoggingBehavior<TRequest, TResponse>> _logger;
     public LoggingBehavior(ILogger<LoggingBehavior<TRequest, TResponse>> logger) => _logger = logger;

src/Services/Ordering/Ordering.API/Application/Behaviors/TransactionBehaviour.cs

@@ -2,7 +2,7 @@
 
 using Microsoft.Extensions.Logging;
 
-public class TransactionBehaviour<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
+public class TransactionBehaviour<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse> where TRequest : IRequest<TResponse>
 {
     private readonly ILogger<TransactionBehaviour<TRequest, TResponse>> _logger;
     private readonly OrderingContext _dbContext;