Fatal error: Uncaught Error: Class "Brick\Math\Internal\Calculator" not found in E:\xampp\htdocs\stms\vendor\brick\math\src\Internal\Calculator\BcMathCalculator.php:16 Stack trace: #0 {main} thrown in E:\xampp\htdocs\stms\vendor\brick\math\src\Internal\Calculator\BcMathCalculator.php on line 16