WARNING(2): "require_once(/var/www/web25897936/html/shop.neiflex.at/inc/is_mobile_template_installed.inc.php): failed to open stream: No such file or directory"

Fatal error: require_once(): Failed opening required '/var/www/web25897936/html/shop.neiflex.at/inc/is_mobile_template_installed.inc.php' (include_path='.:/opt/php/7.4.30/share/pear') in /var/www/web25897936/html/shop.neiflex.at/includes/application_top.php on line 186

COMPILE ERROR(64): "require_once(): Failed opening required '/var/www/web25897936/html/shop.neiflex.at/inc/is_mobile_template_installed.inc.php' (include_path='.:/opt/php/7.4.30/share/pear')"