Warning: require_once(DBBook.php): failed to open stream: No such file or directory in /home/vps100805539/gmac-j.info/book_op.php on line 6

Fatal error: require_once(): Failed opening required 'DBBook.php' (include_path='.:/opt/cpanel/ea-php72/root/usr/share/pear') in /home/vps100805539/gmac-j.info/book_op.php on line 6