Warning: Trying to access array offset on false in C:\01_Projekte\liga_24\phpseclib\vendor\brianium\paratest\bin\phpunit-wrapper.php on line 26

Fatal error: Uncaught TypeError: fopen(): Argument #1 ($filename) must be of type string, null given in C:\01_Projekte\liga_24\phpseclib\vendor\brianium\paratest\bin\phpunit-wrapper.php:26 Stack trace: #0 C:\01_Projekte\liga_24\phpseclib\vendor\brianium\paratest\bin\phpunit-wrapper.php(26): fopen() #1 C:\01_Projekte\liga_24\phpseclib\vendor\brianium\paratest\bin\phpunit-wrapper.php(47): {closure:C:\01_Projekte\liga_24\phpseclib\vendor\brianium\paratest\bin\phpunit-wrapper.php:7}() #2 {main} thrown in C:\01_Projekte\liga_24\phpseclib\vendor\brianium\paratest\bin\phpunit-wrapper.php on line 26