Red triangle won't go away; can't download to primary eM Client PC installation

I installed a second copy of eM Client on my iPad 10 days ago. I used the iPad installation while away from home for a week (7/5-7/12).

I use my primary copy on a Dell PC, with plenty of RAM and disk space, and most recent installation of Windows 11. My email comes from Earthlink.

Beginning about 4 p.m. yesterday a red triangle began appearing opposite my email account name in my primary (PC) eM Client client. I have tried everything I can think of or can understand from various suggested solutions to clear the triangle, to no avail. I am hoping someone out there will provide a solution. (Oddly, the version on my iPad also shows a red triangle, but that version successfully downloads emails from the Earthlink server.)

Following is the most recent Operations Log entry, recorded at 4:41:41 pm today (eight minutes ago):

4:41:11 PM [email protected] [IMAP] MailClient.Accounts.ConnectionException: Moving item(s) from folder ‘[email protected]/Inbox’ to folder ‘[email protected]/Trash’ failed due to the following error: Connection was closed
—> MailClient.Imap.Base.ByeException: Connection was closed
—> System.Threading.Tasks.TaskCanceledException: A task was canceled.
at MailClient.Imap.Base.Connection.RunCommandAsync(Command command, Func3 notificationCallback) --- End of inner exception stack trace --- at MailClient.Imap.Base.Connection.RunCommandAsync(Command command, Func3 notificationCallback)
at MailClient.Protocols.Imap.ConnectionExtensions.RunExpungeCommand(ConnectionContext context, SequenceSet uids, Command command)
at MailClient.Protocols.Imap.ConnectionExtensions.RunExpungeCommand(ConnectionContext context, SequenceSet uids, Command command)
at MailClient.Protocols.Imap.ImapMailSynchronizer.DeleteAsync(Folder folder, IEnumerable1 items, CancellationToken cancellationToken) at MailClient.Protocols.Imap.ImapMailSynchronizer.DeleteAsync(Folder folder, IEnumerable1 items, CancellationToken cancellationToken)
at MailClient.Protocols.Imap.ImapMailSynchronizer.MoveAsync(Folder folder, IEnumerable1 items, Folder targetFolder, CancellationToken cancellationToken, Boolean checkGmailInboxTags) at MailClient.Protocols.Imap.ImapMailSynchronizer.MoveAsync(Folder folder, IEnumerable1 items, Folder targetFolder, CancellationToken cancellationToken, Boolean checkGmailInboxTags)
at MailClient.Protocols.Imap.ImapMailSynchronizer.MoveAsync(IItemMoveContext1 moveContext, Folder folder, IEnumerable1 items, Folder targetFolder, CancellationToken cancellationToken)
at MailClient.Protocols.Imap.ImapMailSynchronizer.Move(IItemMoveContext1 moveContext, Folder folder, IEnumerable1 items, Folder targetFolder, CancellationToken cancellationToken)
at MailClient.Protocols.Common.ItemSynchronizer2.<>c__DisplayClass33_0.<EnqueueMove>b__0(WorkerStatus status, CancellationToken cancellationToken) at MailClient.Protocols.Imap.ImapActionCommand.<>c__DisplayClass11_0.<.ctor>b__0(WorkerStatus ws, CancellationToken ct) at MailClient.Protocols.Imap.ImapActionCommand.ExecuteInternalSync(WorkerStatus status) --- End of inner exception stack trace --- at MailClient.Protocols.Imap.ImapActionCommand.ExecuteInternalSync(WorkerStatus status) at MailClient.Protocols.Imap.ImapActionCommand.Execute(WorkerStatus status) at MailClient.Commands.Command.Process(WorkerStatus status) AccountId = 01520a38-6959-45ac-bf26-b986bb7e122c AccountName = [email protected] IMAP_SERVER_TYPE = Other RunInPlace = False EnqueuedStackTrace = at MailClient.Protocols.Common.ItemSynchronizer2.EnqueueMove(Folder folder, IEnumerable1 items, Folder targetFolder) at MailClient.Protocols.Common.ItemSynchronizer2.GoOnline()
at MailClient.Protocols.Imap.ImapMailSynchronizer.GoOnline()
at MailClient.Protocols.Imap.ImapAccount.GoOnlineInt()
at MailClient.Protocols.Common.AccountBase.ChangeOnlineState(Boolean online, OfflineReason offlineReason)
at MailClient.Protocols.Common.AccountBase.GoOnline()
at MailClient.Protocols.Common.AccountBase.RunIfOnline[T](Func1 actionIfOnline, Func1 actionIfOffline)
at MailClient.Protocols.Common.SynchronizableMailAccount.Synchronize(SynchronizationPriority priority)
at MailClient.Accounts.BindingAccountBase.Receive()
at MailClient.Accounts.AccountManager.ReceiveAllInternal(Boolean checkIncludeInGlobalOperations, Boolean fromBackgroundSync)
at MailClient.Accounts.AccountManager.SendAndReceiveAll(Boolean checkIncludeInGlobalOperations)
at MailClient.Accounts.DesktopAccountManager.timerSendAndReceive_Tick(Object sender, EventArgs e)
at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)
at Windows.Win32.PInvoke.DispatchMessage(MSG* lpMsg)
at System.Windows.Forms.Application.ComponentManager.Microsoft.Office.IMsoComponentManager.FPushMessageLoop(UIntPtr dwComponentID, msoloop uReason, Void* pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(msoloop reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(msoloop reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at MailClient.Program.<>c.b__209_4()
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at MailClient.Common.UI.Forms.BaseForm.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)
at Xilium.CefGlue.Interop.libcef.run_message_loop()
at MailClient.Program.Main(String args)
GUIStatus_Exception_Reported = True
ByeException
COMMAND = UID EXPUNGE 224675,224687,224689,224694,224703,224710,224712,224724,224728,224733,224741,224743,224749,224756,224758,224761,224766,224769,224814,224830,224832,224845,224855,224860,224863,224869,224872,224900,224928,224934,224936,224944:224947,224951,224954,224956,224959,224962,224964,224969,224971:224972,224975,224978,224982,224989,224993,224998:224999,225001:225002,225008,225012,225018,225024,225026,225034,225038,225044,225046
TaskCanceledException
COMMAND = UID EXPUNGE 224675,224687,224689,224694,224703,224710,224712,224724,224728,224733,224741,224743,224749,224756,224758,224761,224766,224769,224814,224830,224832,224845,224855,224860,224863,224869,224872,224900,224928,224934,224936,224944:224947,224951,224954,224956,224959,224962,224964,224969,224971:224972,224975,224978,224982,224989,224993,224998:224999,225001:225002,225008,225012,225018,225024,225026,225034,225038,225044,225046
4:41:11 PM [email protected] [IMAP] System.Threading.Tasks.TaskCanceledException: A task was canceled.
at MailClient.Protocols.Imap.ImapAccount.SynchronizeIntAsync(Boolean forced)
at MailClient.Protocols.Common.SynchronizableMailAccount.<>c__DisplayClass22_0.<b__0>d.MoveNext()
GUIStatus_Exception_Reported = True