Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for gase-dbproxy-site.in.zfx.loc failed: Try again in /var/www/html/zfx-shared-classes/DBcustom.php on line 24

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for gase-dbproxy-site.in.zfx.loc failed: Try again in /var/www/html/zfx-shared-classes/DBcustom.php:24
Stack trace:
#0 /var/www/html/zfx-shared-classes/DBcustom.php(24): mysqli_connect()
#1 /var/www/html/zfx-shared-classes/DBcustom.php(110): DBcustom->__construct()
#2 /var/www/html/wp-config.php(8): DBcustom::getInstance()
#3 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...')
#4 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...')
#5 /var/www/html/index.php(17): require('/var/www/html/w...')
#6 {main}
  thrown in /var/www/html/zfx-shared-classes/DBcustom.php on line 24