Fatal error: Uncaught Error: Call to undefined function Amp\coroutine() in /home/marketbg/public_html/oferta.testmarketbg.com/vendor/amphp/amp/examples/psalm/coroutine.php:13 Stack trace: #0 {main} thrown in /home/marketbg/public_html/oferta.testmarketbg.com/vendor/amphp/amp/examples/psalm/coroutine.php on line 13