When user tries to use backuper on marzneshin with mariadb it returns : mysqldump: unknown variable
Issue is Backuper use --column-statistics flag which is NOT supported by mariadb .
Here is the exact line in backup file :
"mysqldump -h 127.0.0.1 --column-statistics=0 -P 3306 -u root -p'K!rTo0MarzBan12' 'marzneshin' > /root/xxx.sql"
Removing --column-statistics=0 from the line solves the issue entirely .