Fatal error: Uncaught Error: Interface 'Composer\Semver\Constraint\ConstraintInterface' not found in E:\xampp\htdocs\www\yunwei\qr2500\vendor\composer\semver\src\Constraint\MultiConstraint.php:17 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\yunwei\qr2500\vendor\composer\semver\src\Constraint\MultiConstraint.php on line 17