Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromisorInterface' not found in D:\svn\epic-site(사전예약)\default\vendor\guzzlehttp\guzzle\src\Pool.php:21
Stack trace:
#0 {main}
thrown in D:\svn\epic-site(사전예약)\default\vendor\guzzlehttp\guzzle\src\Pool.php on line 21