bazı PHP hataları, çözüm aranıyor

1-2 sitemde aşağıdaki hatalar belirmeye başladı,
Bu konuda yardımcı olmanız rica...

1-)Warning: include_once(class.sitemap.php): failed to open stream: No such file or directory in /home/antal151/public_html/xxxxxxxx.com/padmin/system/config.php on line 16

2-)Warning: include_once(): Failed opening 'class.sitemap.php' for inclusion (include_path='.:/opt/alt/php56/usr/share/pear:/opt/alt/php56/usr/share/php') in /home/antal151/public_html/xxxxxxxx.com/padmin/system/config.php on line 16

3-)Strict Standards: Declaration of ezSQL_mysql::query() should be compatible with ezSQLcore::query() in /home/antal151/public_html/xxxxxxxx.com/padmin/system/ez_sql_mysql.php on line 0

4-)Strict Standards: Declaration of ezSQL_mysql::escape() should be compatible with ezSQLcore::escape() in /home/antal151/public_html/xxxxxxxx.com/padmin/system/ez_sql_mysql.php on line 0

5-)Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/antal151/public_html/xxxxxx.com/inc/dbconn.php on line 3

6-)Warning: Creating default object from empty value in /home/antal151/public_html/xxxxxx.com/system/function.php on line 150