GuzzleHttp\Exception\ConnectException: cURL error 28 when using Google Cloud Speech PHP API - guzzle

Question

Following Google's instructions to the letter.
This is what I get:
Fatal error: Uncaught GuzzleHttp\Exception\ConnectException: cURL error 28: Connection timed out after 500 milliseconds (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) in C:\xampp\htdocs\ModernMT\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php:207 Stack trace: #0 C:\xampp\htdocs\ModernMT\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(162): GuzzleHttp\Handler\CurlFactory::createRejection(Object(GuzzleHttp\Handler\EasyHandle), Array) #1 C:\xampp\htdocs\ModernMT\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(109): GuzzleHttp\Handler\CurlFactory::finishError(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory)) #2 C:\xampp\htdocs\ModernMT\vendor\guzzlehttp\guzzle\src\Handler\CurlHandler.php(45): GuzzleHttp\Handler\CurlFactory::finish(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory)) #3 C:\xampp\htdocs\ModernMT\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(30): GuzzleH in C:\xampp\htdocs\ModernMT\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 207
This happens right after:
# Instantiates a client
$client = new SpeechClient();

Answer 1

Straight from the developers of Google Cloud:
After investigating a bit further, it looks like this is a bug in the google/auth dependency. We just merged a fix, and it should be tagged by the end of the day. You can wait for that (watch this page for v1.11.1), or you could require guzzlehttp/guzzle at ^6.5 to get it working right now. Sorry for the trouble, and thanks for bringing it to our attention!