VDDK error: 14009 (The server refused connection). Value: 0x00000000000036b9

[CS-WEBSYSTEM]

Hi, everyone,

My backup has not worked for a few days and I get the following error from Veeam.
VDDK error: 14009 (The server refused connection). Value: 0x00000000000036b9

According to Veeam Support, the problem is with VMWare, but I can't find anything that has helped me so far. do you have ideas. I'm still quite new to the matter

Attached is the log with the error from Veeam

[06.01.2022 17:20:19] <31> Error Failed to open VDDK disk [[ESXi-02.local01] DB-SRV01/DB-SRV01.vmdk] ( is read-only mode - [true] ) (Veeam.Backup.Common.CCppComponentException)
[06.01.2022 17:20:19] <31> Error in c++: {
[06.01.2022 17:20:19] <31> Error in c++: VDDK error: 14009 (The server refused connection). Value: 0x00000000000036b9
[06.01.2022 17:20:19] <31> Error in c++: Failed to open virtual disk [ESXi-02.local01] DB-SRV01/DB-SRV01.vmdk (flags: 4)
[06.01.2022 17:20:19] <31> Error in c++: Failed to execute VDDK command 'Open'
[06.01.2022 17:20:19] <31> Error Logon attempt with parameters [VC/ESX: [vcenter7.xxx.local];Port: 443;Login: [xxx\vBackup];VMX Spec: [moref=vm-91];Snapshot mor: [snapshot-1011];Transports: [nbd];Read Only: [true]] failed because of the following errors: (Veeam.Backup.Common.CCppComponentException)
[06.01.2022 17:20:19] <31> Error in c++: }
[06.01.2022 17:20:19] <31> Error Failed to open disk for read. (Veeam.Backup.Common.CCppComponentException)
[06.01.2022 17:20:19] <31> Error in c++: Failed to open live disk source.
[06.01.2022 17:20:19] <31> Error Failed to upload disk. Skipped arguments: [vddkConnSpec>]; (Veeam.Backup.Common.CCppComponentException)
[06.01.2022 17:20:19] <31> Error in c++: Disk upload failed.
[06.01.2022 17:20:19] <31> Error Agent failed to process method {DataTransfer.SyncDisk}. (Veeam.Backup.Common.CCppComponentException)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Common.CVcpInvoker.Invoke(CVcpStreamBase stream, String command, CVcpCommandArgs inArgs, Boolean noLog)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.AgentProvider.CClientAgentProtocol.Invoke(String command, CVcpCommandArgs inArgs, Boolean noLog, Boolean agentNoLog)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.AgentProvider.CBackupClient.Invoke(String command, CVcpCommandArgs inArgs, Boolean noLog)
[06.01.2022 17:20:19] <31> Error --- Ende der Stapelüberwachung vom vorhergehenden Ort, an dem die Ausnahme ausgelöst wurde ---
[06.01.2022 17:20:19] <31> Error bei System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Common.ExceptionFactory.ThrowNecessaryAggregateException(IEnumerable`1 exceptionsCollection)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.AgentProvider.CBackupClientImpl.ConstructException(Exception exception, String error)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.AgentProvider.CBackupClient.ConstructException(Exception ex, String error, Object[] args)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.AgentProvider.CBackupClient.OnInvokeError(Exception e, String command, CVcpCommandArgs inArgs)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.AgentProvider.CBackupClient.Invoke(String command, CVcpCommandArgs inArgs, Boolean noLog)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.AgentProvider.CBackupClient.DataTransferSyncDisk(ISourceDiskSpec source, ITargetDiskSpec target, Boolean serverHandlesSource, String operationId, Boolean treatProcessedLikeReaded)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CAgentSyncDiskTransport.<>c__DisplayClass21_0.<SyncDisk>b__0()
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CAgentSyncDiskTransport.ProcessDisk(IDiskTaskSource diskTaskSource, IDiskTaskTarget diskTaskTarget, CDiskDigestHook sourceHook)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CViDiskTransferPlatform.SrcBackupDiskFullImpl(IBackupClientInvoker sourceClient, CBackupDiskTarget diskTaskTarget, IDiskTaskSource diskTaskSource)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CViDiskTransferPlatform.BackupDisk(IBackupClientInvoker client, IDiskTaskSource diskTaskSource, IDiskTaskTarget diskTaskTarget)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CBackupDiskTransferAlg.ProcessDisk(IDiskTaskSource diskTaskSource, IDiskTaskTarget diskTaskTarget, IStopSessionSync stopSessionSync)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CBackupDiskTransferAlg.ProcessDisk(CDiskTask diskTask, IStopSessionSync stopSessionSync)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CParallelDiskProcessorImpl.ProcessDisk(CDiskTask diskTask, IDiskTransferAlg disksAlg)
[06.01.2022 17:20:19] <31> Error --- Ende der Stapelüberwachung vom vorhergehenden Ort, an dem die Ausnahme ausgelöst wurde ---
[06.01.2022 17:20:19] <31> Error bei System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CParallelDiskProcessor.ProcessDisks(CDiskTasksManager diskTasksManager, IDiskTransferAlg disksAlg)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CParallelDiskProcessor.ProcessDisks(IDiskTransferAlg disksAlg, IEnumerable`1 diskBackupObjects)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CTaskProcessor.ProcessTask(IVmBackupTask task, ITasksScheduler tasksScheduler, LogStorage logStorage, IStopSessionSync stopSessionControl, Boolean disableParallelProcessing)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CViBackupJobPerformer.ExecuteTask(IVmBackupTask task, IViTaskSource taskSource, IBackupTaskTarget taskTarget, LogStorage logStorage)
[06.01.2022 17:20:19] <31> Error bei Veeam.Backup.Core.CViBackupJobPerformer.ExecuteTask(IVmBackupTask task, CViJobSource jobSource, CBackupJobTarget jobTarget)
[06.01.2022 17:20:19] <31> Info Job progress: '0%', '0' of '42,949,672,960' bytes, '0' of '42,442,162,176' used bytes, object '1' of '1'
[06.01.2022 17:20:19] <31> Info Task session [c19ef961-4dcf-4c92-8b7e-825869615086] has been completed, status: Failed, 0 of 0 bytes, 0 of 0 used bytes, 7 of 7 objects, details:
[06.01.2022 17:20:22] <42> Info [ReconnectableSocket][StopCondition] Stop confirmation was received on [d98f93e5-5620-4516-aa6f-64b50eef6481].
[06.01.2022 17:20:22] <42> Info [ReconnectableSocket] Stop confirmation was sent on [d98f93e5-5620-4516-aa6f-64b50eef6481].
[06.01.2022 17:20:22] <42> Info [ReconnectableSocket][StopCondition] Stop request was received on [d98f93e5-5620-4516-aa6f-64b50eef6481].
[06.01.2022 17:20:22] <41> Info [ReconnectableSocket][StopCondition] Stop confirmation was received on [7a88356f-3454-4388-ab69-5fa80074e82c].
[06.01.2022 17:20:22] <42> Info [ReconnectableSocket] Stop confirmation was sent on [7a88356f-3454-4388-ab69-5fa80074e82c].
[06.01.2022 17:20:22] <42> Info [ReconnectableSocket][StopCondition] Stop request was received on [7a88356f-3454-4388-ab69-5fa80074e82c].
[06.01.2022 17:20:22] <33> Info [AP] (78b2) command: 'Invoke: Generic.AbortReconnects '
[06.01.2022 17:20:22] <38> Info [AP] (78b2) output: <VCPCommandResult result="true" exception="" />
[06.01.2022 17:20:22] <38> Info [AP] (78b2) output: <VCPCommandArgs />
[06.01.2022 17:20:22] <38> Info [AP] (78b2) output: >
[06.01.2022 17:20:22] <33> Info [RemoteAgentSystemSession] Keep-alive thread operation is canceled, agentId: 'cab12591-a922-4511-8581-78828fd83522'