Notice: Constant WP_DEBUG already defined in /var/customers/webs/ihrservice/ur_kassen_2018/wp-config.php on line 113

Fatal error: Uncaught Error: Call to undefined function str_contains() in /var/customers/webs/ihrservice/ur_kassen_2018/wp-includes/load.php:1687
Stack trace:
#0 /var/customers/webs/ihrservice/ur_kassen_2018/wp-includes/default-constants.php(43): wp_convert_hr_to_bytes('256m')
#1 /var/customers/webs/ihrservice/ur_kassen_2018/wp-settings.php(41): wp_initial_constants()
#2 /var/customers/webs/ihrservice/ur_kassen_2018/wp-config.php(125): require_once('/var/customers/...')
#3 /var/customers/webs/ihrservice/ur_kassen_2018/wp-load.php(37): require_once('/var/customers/...')
#4 /var/customers/webs/ihrservice/ur_kassen_2018/wp-blog-header.php(13): require_once('/var/customers/...')
#5 /var/customers/webs/ihrservice/ur_kassen_2018/index.php(17): require('/var/customers/...')
#6 {main}
  thrown in /var/customers/webs/ihrservice/ur_kassen_2018/wp-includes/load.php on line 1687