Warning: require_once(inc/config.class.php): Failed to open stream: No such file or directory in /var/www/calculator/inc/sqlitex.class.php on line 6

Fatal error: Uncaught Error: Failed opening required 'inc/config.class.php' (include_path='.:/usr/share/php') in /var/www/calculator/inc/sqlitex.class.php:6 Stack trace: #0 /var/www/calculator/autoload.php(4): [constant expression]() #1 /var/www/calculator/inc/sqlitex.class.php(6): {closure}() #2 /var/www/calculator/inc/tag.class.php(12): sqlitex::master() #3 /var/www/calculator/admin/index.php(4): tag::get_all_tags() #4 {main} thrown in /var/www/calculator/inc/sqlitex.class.php on line 6