Fatal error: Uncaught Error: Interface 'React\Promise\ExtendedPromiseInterface' not found in /home/soh-works/www/websoket-sample/vendor/react/promise/src/RejectedPromise.php:8
Stack trace:
#0 {main}
thrown in /home/soh-works/www/websoket-sample/vendor/react/promise/src/RejectedPromise.php on line 8