Fatal error: Uncaught Error: Interface "PostSMTP\Vendor\GuzzleHttp\Promise\PromiseInterface" not found in /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Postman-Mail/libs/vendor_prefixed/guzzlehttp/promises/src/FulfilledPromise.php:14 Stack trace: #0 {main} thrown in /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Postman-Mail/libs/vendor_prefixed/guzzlehttp/promises/src/FulfilledPromise.php on line 14