Fatal error: Uncaught Error: Class "GuzzleHttp\HandlerStack" not found in /home/karabro/payment.dev.bahnflow.se/swish/src/Client.php:116 Stack trace: #0 /home/karabro/payment.dev.bahnflow.se/swish/index.php(15): HelmutSchneider\Swish\Client::make('root1.crt', Array) #1 {main} thrown in /home/karabro/payment.dev.bahnflow.se/swish/src/Client.php on line 116