You can easily ignore SSL certificate errors with Guzzle by setting the verify option to false while creating a new Guzzle Client object.
Here is some sample code that creates a new Guzzle client with verify set to false:
use GuzzleHttp\Client;
$client = new Client(['verify' => false]);
$response = $client->get('https://example.com/');
You can read more about the verify option in the official docs.
Do keep in mind that disabling SSL verification can compromise security and should be used with caution. It is generally recommended to only disable SSL verification for testing or development purposes and to enable it in production.