Run SnapSync for database "bucks".
Failed to dump the database "bucks" on instance "RH65_ASE16_S1" using backup server "RH65_ASE16_TGT_S1_BS": 501602: Backup Server: 5.16.2.2: Client-Library error: Error number 44, Layer 4, Origin 1, Severity 4: ct_connect(): protocol specific layer: external error: The attempt to connect to the server failed.
Make sure that the backup servers are configured correctly between the source instance "RH65_ASE16_S1" and the staging instance "RH65_ASE16_TGT_S1", and try the operation again.