Fatal error: Uncaught Error: Interface 'React\Promise\PromiseInterface' not found in /home/visaversa/public_html/wp-content/plugins/constant-contact-forms/vendor/guzzlehttp/ringphp/src/Future/FutureInterface.php:19 Stack trace: #0 {main} thrown in /home/visaversa/public_html/wp-content/plugins/constant-contact-forms/vendor/guzzlehttp/ringphp/src/Future/FutureInterface.php on line 19