Cloning product got this error:
Fatal error: Uncaught Error: Call to undefined method stdClass::check() in /product/card.php on line 915 Error: Call to undefined method stdClass::check() in /product/card.php on line 915 Call Stack: 0.0002 404120 1. {main}() /product/card.php:0
Happened after upgraded to V18.0.0, you can see the error at the dolibarr online demo as well.