Fatal error: Uncaught Error: Interface 'React\Promise\PromisorInterface' not found in /home/soh-works/www/websoket-sample/vendor/react/promise/src/Deferred.php:5
Stack trace:
#0 {main}
thrown in /home/soh-works/www/websoket-sample/vendor/react/promise/src/Deferred.php on line 5