Data Domain server "dd3300.bbic.na" open failed DDR result code: 5049, desc: file not found

I need help please. 

I cannot backup with Avamar Virtual Edition 19.4 to Data Domain (DD3300) version 7.5.

2021-06-02 11:46:09 avtar Info <19155>: - Establishing a connection via token to the Data Domain system with certificate authentication (Connection mode: A:2 E:1).
2021-06-02 11:46:09 avtar Warning <18125>: Calling DDR_OPEN_VIA_TOKEN returned result code:5049 message:file not found
2021-06-02 11:46:09 avtar Error <10542>: Data Domain server "dd3300.bbic.na" open failed DDR result code: 5049, desc: file not found
2021-06-02 11:46:09 avtar Error <10509>: Problem logging into the DDR server:'', only GSAN communication was enabled.
2021-06-02 11:46:09 avtar FATAL <17964>: Backup is incomplete because file "/ddr_files.xml" is missing
2021-06-02 11:46:09 avtar Info <10642>: DDR errors caused the backup to not be posted, errors=0, fatals=0
2021-06-02 11:46:09 avtar Info <12530>: Backup was not committed to the DDR.
2021-06-02 11:46:09 avtar FATAL <8941>: Fatal server connection problem, aborting initialization. Verify correct server address and login credentials.
2021-06-02 11:46:09 avtar Info <6149>: Error summary: 4 errors: 10542, 8941, 10509, 17964
2021-06-02 11:46:09 avtar Info <8468>: Sending wrapup message to parent
2021-06-02 11:46:09 avtar Info <5314>: Command failed (4 errors, 1 warning, exit code 10008: cannot establish connection with server (possible network or DNS failure))