Сталась помилка системи

An exception has been raised that is likely due to a transient failure. Consider enabling transient error resiliency by adding 'EnableRetryOnFailure' to the 'UseSqlServer' call.

   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.RelationalShapedQueryCompilingExpressionVisitor.ShaperProcessingExpressionVisitor.PopulateSplitCollectionAsync[TCollection,TElement,TRelatedEntity](Int32 collectionId, RelationalQueryContext queryContext, IExecutionStrategy executionStrategy, RelationalCommandResolver relationalCommandResolver, IReadOnlyList`1 readerColumns, Boolean detailedErrorsEnabled, SplitQueryResultCoordinator resultCoordinator, Func`3 childIdentifier, IReadOnlyList`1 identifierValueComparers, Func`5 innerShaper, Func`4 relatedDataLoaders)
   at Microsoft.EntityFrameworkCore.Query.RelationalShapedQueryCompilingExpressionVisitor.ShaperProcessingExpressionVisitor.TaskAwaiter(Func`1[] taskFactories)
   at Microsoft.EntityFrameworkCore.Query.Internal.SplitQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
   at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
   at Education.Pages.Schedule.ScheduleEmployeePage.OnParametersSetAsync() in D:\Git\university\Education\Pages\Schedule\ScheduleEmployeePage.razor:line 183
   at Education.Pages.Schedule.ScheduleEmployeePage.OnParametersSetAsync() in D:\Git\university\Education\Pages\Schedule\ScheduleEmployeePage.razor:line 215
   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
   at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)