Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromisorInterface' not found in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\promises\src\EachPromise.php:8
Stack trace:
#0 {main}
thrown in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\promises\src\EachPromise.php on line 8