backup message.....what next?

System.IO.FileNotFoundException: Could not find file ‘C:\Users\Lyle\Documents\eM Client\backup_201901031406.zip.incomplete’. File name: ‘C:\Users\Lyle\Documents\eM Client\backup_201901031406.zip.incomplete’ at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) at System.IO.FileStream…ctor(String path, FileMode mode, FileAccess access) at MailClient.Storage.Backup.BackupCompressionTool…ctor(String backupDirectory) at DbBackup.FormBackup.Backup(CancellationToken cancellationToken) at DbBackup.FormBackup.b__27_0(Object a, DoWorkEventArgs b) at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)