Fatal error: Uncaught Error: Class "MathPHP\Exception\MatrixException" not found in /home/peekizt/www/vendor/markrogoyski/math-php/src/Exception/SingularMatrixException.php:5 Stack trace: #0 {main} thrown in /home/peekizt/www/vendor/markrogoyski/math-php/src/Exception/SingularMatrixException.php on line 5