Fatal error: Uncaught Guzzle\Http\Exception\CurlException: [curl] 60: SSL certificate problem: unable to get local issuer certificate [url] https://api.mailgun.net/v2/sandbox5df004eb5d794a81812a77a24f66a54b.mailgun.org/messages in /home/cp2inkrefuge/public_html/access/mailgun-api-mail/vendor/guzzle/guzzle/src/Guzzle/Http/Curl/CurlMulti.php:359 Stack trace: #0 /home/cp2inkrefuge/public_html/access/mailgun-api-mail/vendor/guzzle/guzzle/src/Guzzle/Http/Curl/CurlMulti.php(292): Guzzle\Http\Curl\CurlMulti->isCurlException(Object(Guzzle\Http\Message\EntityEnclosingRequest), Object(Guzzle\Http\Curl\CurlHandle), Array) #1 /home/cp2inkrefuge/public_html/access/mailgun-api-mail/vendor/guzzle/guzzle/src/Guzzle/Http/Curl/CurlMulti.php(257): Guzzle\Http\Curl\CurlMulti->processResponse(Object(Guzzle\Http\Message\EntityEnclosingRequest), Object(Guzzle\Http\Curl\CurlHandle), Array) #2 /home/cp2inkrefuge/public_html/access/mailgun-api-mail/vendor/guzzle/guzzle/src/Guzzle/Http/Curl/CurlMulti.php(240): Guzzle\Http\Curl\CurlMulti->processMes in /home/cp2inkrefuge/public_html/access/mailgun-api-mail/vendor/guzzle/guzzle/src/Guzzle/Http/Curl/CurlMulti.php on line 359