Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromisorInterface" not found in D:\inetpub\localuser\static.ecare.pro\fcm\vendor\guzzlehttp\guzzle\src\Pool.php:24
Stack trace:
#0 {main}
  thrown in D:\inetpub\localuser\static.ecare.pro\fcm\vendor\guzzlehttp\guzzle\src\Pool.php on line 24