Fatal error: Uncaught Error: Class 'Matrix\Operators\Operator' not found in D:\svn\bitfx\vendor\markbaker\matrix\classes\src\Operators\Subtraction.php:8 Stack trace: #0 {main} thrown in D:\svn\bitfx\vendor\markbaker\matrix\classes\src\Operators\Subtraction.php on line 8