Hi,
I have seen these exceptions on the log page.
It started yesterday and happened a couple of times. Before that I changed Referrer Policy in web.config file from same-origin to origin.
I dont know if its because of that.
Is there any problem changing the refferer policy in this way. It was needed to embed vimeo videos on my custom pages.
Thank you.
Here are the exception details.
From log page: 3 Errors:

Error  The client has disconnected  08/05/2020 03:14:00  View
  Error  An exception was thrown while activating Nop.Web.Framework.WebWorkContext -> Nop.Services.Directory.CurrencyService -> Nop.Services.Directory.ExchangeRatePluginManager -> Nop.Services.Plugins.PluginService -> Nop.Data.Migrations.MigrationManager -> λ:FluentMigrator.Runner.IVersionLoader.  08/05/2020 00:47:12  View
  Error  The "Send emails" scheduled task failed with the "A scheduled task canceled. Timeout expired." error (Task type: "Nop.Services.Messages.QueuedMessagesSendTask, Nop.Services". Store name: "Streamzy". Task run address: "https://www.streamzy.co.uk/scheduletask/runtask").  08/05/2020 00:47:11  View
  Error  An exception was thrown while activating Nop.Web.Framework.WebWorkContext -> Nop.Services.Directory.CurrencyService -> Nop.Services.Directory.ExchangeRatePluginManager -> Nop.Services.Plugins.PluginService -> Nop.Data.Migrations.MigrationManager -> λ:FluentMigrator.Runner.IVersionLoader.

The details view:

Log level
Error
Short message
An exception was thrown while activating Nop.Web.Framework.WebWorkContext -> Nop.Services.Directory.CurrencyService -> Nop.Services.Directory.ExchangeRatePluginManager -> Nop.Services.Plugins.PluginService -> Nop.Data.Migrations.MigrationManager -> λ:FluentMigrator.Runner.IVersionLoader.
Full message
Autofac.Core.DependencyResolutionException: An exception was thrown while activating Nop.Web.Framework.WebWorkContext -> Nop.Services.Directory.CurrencyService -> Nop.Services.Directory.ExchangeRatePluginManager -> Nop.Services.Plugins.PluginService -> Nop.Data.Migrations.MigrationManager -> λ:FluentMigrator.Runner.IVersionLoader.
---> System.Exception: An error occured executing the following sql:
CREATE TABLE [dbo].[MigrationVersionInfo] ([Version] BIGINT NOT NULL)
The error was There is already an object named 'MigrationVersionInfo' in the database.

---> System.Data.SqlClient.SqlException (0x80131904): There is already an object named 'MigrationVersionInfo' in the database.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite, String methodName)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at FluentMigrator.Runner.Processors.SqlServer.SqlServerProcessor.ExecuteNonQuery(String sql)
ClientConnectionId:13069908-b706-4d33-ae80-0e80991d0cb3
Error Number:2714,State:6,Class:16
   --- End of inner exception stack trace ---
   at FluentMigrator.Runner.Processors.SqlServer.SqlServerProcessor.ExecuteNonQuery(String sql)
   at FluentMigrator.Runner.Processors.SqlServer.SqlServerProcessor.Process(String sql)
   at FluentMigrator.Runner.Processors.ProcessorBase.Process(CreateTableExpression expression)
   at FluentMigrator.Expressions.CreateTableExpression.ExecuteWith(IMigrationProcessor processor)
   at FluentMigrator.Runner.MigrationRunner.<>c__DisplayClass80_0.<ExecuteExpressions>b__1()
   at FluentMigrator.Runner.StopWatch.Time(Action action)
   at FluentMigrator.Runner.MigrationRunner.ExecuteExpressions(ICollection`1 expressions)
   at FluentMigrator.Runner.MigrationRunner.ExecuteMigration(IMigration migration, Action`2 getExpressions)
   at FluentMigrator.Runner.MigrationRunner.ApplyMigrationUp(IMigrationInfo migrationInfo, Boolean useTransaction)
   at FluentMigrator.Runner.VersionLoader.LoadVersionInfo()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, Object[] parameters)
   at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance[T](IServiceProvider provider, Object[] parameters)
   at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)
   at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters, Object& decoratorTarget)
   --- End of inner exception stack trace ---
   at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters, Object& decoratorTarget)
   at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func`1 creator)
   at Autofac.Core.Resolving.InstanceLookup.Execute()
   at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, ResolveRequest request)
   at Autofac.Core.Resolving.ResolveOperation.Execute(ResolveRequest request)
   at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)
   at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable`1 parameters)
   at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.GetService(IServiceProvider sp, Type type, Type middleware)
   at lambda_method(Closure , Object , HttpContext , IServiceProvider )
   at Microsoft.AspNetCore.Localization.RequestLocalizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Nop.Services.Installation.InstallUrlMiddleware.Invoke(HttpContext context, IWebHelper webHelper) in C:\Streamzy\StreamzyNopCommerce\Libraries\Nop.Services\Installation\InstallUrlMiddleware.cs:line 53
   at Nop.Services.Common.KeepAliveMiddleware.Invoke(HttpContext context, IWebHelper webHelper) in C:\Streamzy\StreamzyNopCommerce\Libraries\Nop.Services\Common\KeepAliveMiddleware.cs:line 50
   at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)
IP address
109.104.118.67
Customer
[email protected]

———————————

Log level
Error
Short message
The "Send emails" scheduled task failed with the "A scheduled task canceled. Timeout expired." error (Task type: "Nop.Services.Messages.QueuedMessagesSendTask, Nop.Services". Store name: "Streamzy". Task run address: "https://www.streamzy.co.uk/scheduletask/runtask").
Full message
System.AggregateException: One or more errors occurred. (A task was canceled.)
---> System.Threading.Tasks.TaskCanceledException: A task was canceled.
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at Nop.Services.Tasks.TaskThread.Run() in C:\Streamzy\StreamzyNopCommerce\Libraries\Nop.Services\Tasks\TaskThread.cs:line 72
IP address
Customer
Page URL
Referrer URL

——————————-


Log level
Error
Short message
An exception was thrown while activating Nop.Web.Framework.WebWorkContext -> Nop.Services.Directory.CurrencyService -> Nop.Services.Directory.ExchangeRatePluginManager -> Nop.Services.Plugins.PluginService -> Nop.Data.Migrations.MigrationManager -> λ:FluentMigrator.Runner.IVersionLoader.
Full message
Autofac.Core.DependencyResolutionException: An exception was thrown while activating Nop.Web.Framework.WebWorkContext -> Nop.Services.Directory.CurrencyService -> Nop.Services.Directory.ExchangeRatePluginManager -> Nop.Services.Plugins.PluginService -> Nop.Data.Migrations.MigrationManager -> λ:FluentMigrator.Runner.IVersionLoader.
---> System.Exception: An error occured executing the following sql:
CREATE TABLE [dbo].[MigrationVersionInfo] ([Version] BIGINT NOT NULL)
The error was There is already an object named 'MigrationVersionInfo' in the database.

---> System.Data.SqlClient.SqlException (0x80131904): There is already an object named 'MigrationVersionInfo' in the database.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite, String methodName)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at FluentMigrator.Runner.Processors.SqlServer.SqlServerProcessor.ExecuteNonQuery(String sql)
ClientConnectionId:5933ab33-b16d-4c88-99a8-67e79bfec34f
Error Number:2714,State:6,Class:16
   --- End of inner exception stack trace ---
   at FluentMigrator.Runner.Processors.SqlServer.SqlServerProcessor.ExecuteNonQuery(String sql)
   at FluentMigrator.Runner.Processors.SqlServer.SqlServerProcessor.Process(String sql)
   at FluentMigrator.Runner.Processors.ProcessorBase.Process(CreateTableExpression expression)
   at FluentMigrator.Expressions.CreateTableExpression.ExecuteWith(IMigrationProcessor processor)
   at FluentMigrator.Runner.MigrationRunner.<>c__DisplayClass80_0.<ExecuteExpressions>b__1()
   at FluentMigrator.Runner.StopWatch.Time(Action action)
   at FluentMigrator.Runner.MigrationRunner.ExecuteExpressions(ICollection`1 expressions)
   at FluentMigrator.Runner.MigrationRunner.ExecuteMigration(IMigration migration, Action`2 getExpressions)
   at FluentMigrator.Runner.MigrationRunner.ApplyMigrationUp(IMigrationInfo migrationInfo, Boolean useTransaction)
   at FluentMigrator.Runner.VersionLoader.LoadVersionInfo()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, Object[] parameters)
   at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance[T](IServiceProvider provider, Object[] parameters)
   at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)
   at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters, Object& decoratorTarget)
   --- End of inner exception stack trace ---
   at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable`1 parameters, Object& decoratorTarget)
   at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func`1 creator)
   at Autofac.Core.Resolving.InstanceLookup.Execute()
   at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, ResolveRequest request)
   at Autofac.Core.Resolving.ResolveOperation.Execute(ResolveRequest request)
   at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)
   at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable`1 parameters)
   at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.GetService(IServiceProvider sp, Type type, Type middleware)
   at lambda_method(Closure , Object , HttpContext , IServiceProvider )
   at Microsoft.AspNetCore.Localization.RequestLocalizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Nop.Services.Installation.InstallUrlMiddleware.Invoke(HttpContext context, IWebHelper webHelper) in C:\Streamzy\StreamzyNopCommerce\Libraries\Nop.Services\Installation\InstallUrlMiddleware.cs:line 53
   at Nop.Services.Common.KeepAliveMiddleware.Invoke(HttpContext context, IWebHelper webHelper) in C:\Streamzy\StreamzyNopCommerce\Libraries\Nop.Services\Common\KeepAliveMiddleware.cs:line 50
   at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)
IP address
109.104.118.67
Customer
[email protected]