We are unable to backup our Directadmin Hosting Accounts to our Storage Server (Which is in different location). The backup job was working fine a month ago but suddenly it stopped backing up and gives an error. Another thing is I'm continously facing license verification error too. I have to verify every using command line. Any help will be appreciated.

Kindly check the below error and my log:
Error:
[03/Aug/2021 08:27:14 +0000] [PID 16168] [ERROR] Failed making API call to directadmin. Error: A PKCS #11 module returned CKR_DEVICE_ERROR, indicating that a problem has occurred with the token or slot. (Status Code: )
[03/Aug/2021 08:27:14 +0000] [PID 16168] Backup Failed
Complete Logs:
[03/Aug/2021 08:27:14 +0000] [PID 16168] Starting account backup for keylimea
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] Destination "MainBackUP" Disk Details: Total - 1.8 TB | Available - 1.6 TB | Used - 266.3 GB
[03/Aug/2021 08:27:14 +0000] [PID 16168] Destination "MainBackUP" Disk Space Usage is 14.16% (266.3 GB out of 1.8 TB)
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] Destination "MainBackUP" | Copy File To Remote: Source - /usr/local/jetapps/tmp/jetbackup5/TiLh48kmcZgVNJXaHQAEaKR4 | Destination - /backupdh11/jetbackup_1_4_605debd3d1ea36391174c112/keylimea_60f994ea598bae42f601cc77/snap.1/jetbackup.index
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] /usr/local/jetapps/usr/bin/rsync --delete -e 'ssh -p 5478 -o ControlPath="/usr/local/jetapps/etc/jetbackup5/.ssh/sockets/605deb0429cfd215cf4e2d42.sock" -x -o ServerAliveInterval=300 -o ServerAliveCountMax=5' -rltqH --safe-links --no-D --ignore-errors -4 --timeout=600 /usr/local/jetapps/tmp/jetbackup5/TiLh48kmcZgVNJXaHQAEaKR4 'root@[176.9.100.180]:/backupdh11/jetbackup_1_4_605debd3d1ea36391174c112/keylimea_60f994ea598bae42f601cc77/snap.1/jetbackup.index'
[03/Aug/2021 08:27:14 +0000] [PID 16168] Configurations Backup
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] -- START --
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] Action: ALL_USER_SHOW
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] Method: GET
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] URL: https://dh11.wehostwebserver.com:2222/C ... W?json=yes
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] Params: bytes=yes&comparison1=equals&value1=keylimea&ipp=1
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] Response Code:
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] Response Body: null
[03/Aug/2021 08:27:14 +0000] [PID 16168] [DEBUG] [PANEL] [API] -- END --
[03/Aug/2021 08:27:14 +0000] [PID 16168] [ERROR] Failed making API call to directadmin. Error: A PKCS #11 module returned CKR_DEVICE_ERROR, indicating that a problem has occurred with the token or slot. (Status Code: )
[03/Aug/2021 08:27:14 +0000] [PID 16168] Backup Failed
[03/Aug/2021 08:27:14 +0000] [PID 16168]