Unable to retrieve VM backup content

In an Avamar (19.4) environment integrated with DataDomain, the backup has been running normally, however, when I tried to restore a full VM backup, an error is displayed: "Cannot browse content. View Details". 

In the details it is displayed:

"avtar Warning <18125>: Calling DDR_OPEN returned result code:5034 message:the user has insufficient privilege avtar Error <10542>: Data Domain server "[DATADOMAIN_NAME]" open failed DDR result code: 5034, desc: the user has insufficient privileges avtar Error <10512>: Problem logging into the DDR server index:1"

In the log (/usr/local/avamar/var/mc/server_log/mcserver.log.0) is displayed:

"03/16-10:44:39.00107 [RMI TCP Connection(676)-[IP_AVAMAR]#12210] com.avamar.mc.dpn.ExecuteCommand.exec

WARNING: STDERR:

avtar Warning <18125>: Calling DDR_OPEN returned result code:5034 message:the user has insufficient privilege

avtar Error <10542>: Data Domain server "[DATADOMAIN_NAME]" open failed DDR result code: 5034, desc: the user has insufficient privilege

avtar Error <10512>: Problem logging into the DDR server index:1

03/16-10:44:39.00107 [RMI TCP Connection(676)-[IP_AVAMAR]#12210] com.avamar.mc.dpn.AvtarCmd.execAvtar

FINE: exec avtar 1 : exit code: '170: /usr/local/avamar/bin/avtar --showlog --noinfo --seq=8 --path=/[VMWARE]/VMs/INFRA.1.80-OCSVM- 13360_KvhPSSBMMXmFYmI4QxrEJw workorder --id=MCUser --ap=******* --hfsaddr=avanix --hfsport=27000 --conntimeout=120 --vardir=/usr/local/avamar/var ' elapsed time: 1403ms

03/16-10:44:39.00107 [RMI TCP Connection(676)-[IP_AVAMAR]#12210] com.avamar.mc.util.MCException.logException

WARNING: java.io.IOException: avtar Warning <18125>: Calling DDR_OPEN returned result code:5034 message:the user has insufficient privilege

avtar Error <10542>: Data Domain server "[DATADOMAIN_NAME]" open failed DDR result code: 5034, desc: the user has insufficient privilege

avtar Error <10512>: Problem logging into the DDR server index:1"

Data Domain monitoring status in AVAMAR is OK, all backups run normally and file level restore (FLR) also works normally.

The problem is just the impossibility of restoring the VM image.

Article number 000203335 (https://www.dell.com/support/kbdoc/en-us/000203335/avamar-19-7) has already been checked, but without success.