Hi Amal,
In your case, you can try the below option.
1.Map your network drive as a local drive in the server itself so that the drive will be like E: or G: something.
2.Then replace in backup_root_dir = E:\Amcan_APR_Backups
Or share that network folder and in the backup_root_dir type as /servername/<shared folder name>
Both things should work.
If not , try to take a backup in a local disk and move it to your desired location as desired.
Thanks and Regards,
Vimal