Fatal error: Uncaught Error: Interface "Grasmash\Expander\StringifierInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\grasmash\expander\src\Stringifier.php:9 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\grasmash\expander\src\Stringifier.php on line 9