Backup Error "Permission Denied in Database"

5/2/2562 8:44 Starting job “Local_Tabian&TQF” - “Full”. Computer “WIN-F1IMSDQF8I1”. App v.“12.2.1”
5/2/2562 8:44 Connecting to SQL Server: 2008 R2 RTM Enterprise Edition (64-bit). 192.168.251.133
5/2/2562 8:44 The backup folder “C:\BackUpDataBase\Pranas.NET\SQLBackupAndFTP\backup” has “307.956GB” free space. The temporary folder “C:\BackUpDataBase\Pranas.NET\SQLBackupAndFTP\backup” has “307.956GB” free space
5/2/2562 8:44 Backing up “192.168.251.133” SQL Server databases
5/2/2562 8:44 Getting maximum file size…
5/2/2562 8:44 The maximum file size: “”
5/2/2562 8:44 Failed to backup “dbTQF” database with “Full” backup type: [JOB-BAK:1301#1] Failed to backup “dbTQF” database. There is no destination selected to keep Full database backup type.
5/2/2562 8:44 Failed to backup “dbtabian2558” database with “Full” backup type: [JOB-BAK:1301#1] Failed to backup “dbtabian2558” database. There is no destination selected to keep Full database backup type.
5/2/2562 8:44 Failed to backup “dbFinance” database with “Full” backup type: [JOB-BAK:1301#1] Failed to backup “dbFinance” database. There is no destination selected to keep Full database backup type.
5/2/2562 8:44 Cleaning up backups of “Local_Tabian&TQF” job
5/2/2562 8:44 Job “Local_Tabian&TQF” finished with “3” errors
5/2/2562 8:44 Sending job log to deaw6101@gmail.com
5/2/2562 8:44 Sending job log to saksun.nong.cpe@gmail.com
5/2/2562 8:44 Sending job log to jindapornongate@gmail.com
5/2/2562 8:44 Sending report to ${https://sqlbackupandftp.com/weblog?jobid=5fcf3d5b-ed07-400a-a669-e494e1729c91|Web Log}

how to backup database