Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in D:\www\www755\assets\s2dimysql.php:83
Stack trace:
#0 D:\www\www755\assets\s2dimysql.php(83): mysqli_query()
#1 D:\www\www755\assets\s2diinit.php(73): dbms->sql_query()
#2 D:\www\www755\assets\s2di.php(16): require('...')
#3 D:\www\www755\ausbildungszentrum\leitstelle---zentrale\index.php(22): require('...')
#4 {main}
  thrown in D:\www\www755\assets\s2dimysql.php on line 83