Fatal error: Uncaught Error: Interface 'PHPUnit\Framework\MockObject\Stub' not found in /home/edomesoft/public_html/pos/umpos/vendor/phpunit/phpunit-mock-objects/src/Stub/ReturnSelf.php:20 Stack trace: #0 {main} thrown in /home/edomesoft/public_html/pos/umpos/vendor/phpunit/phpunit-mock-objects/src/Stub/ReturnSelf.php on line 20