Unexpected Issues

cURL error 52: Empty reply from server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://api.doctorsnetwork.com/api/ea/providers/ef91feb457d28eb52324ba4a8a4dc224 
#0 /var/www/html/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php(158): GuzzleHttp\Handler\CurlFactory::createRejection(Object(GuzzleHttp\Handler\EasyHandle), Array)
#1 /var/www/html/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php(110): GuzzleHttp\Handler\CurlFactory::finishError(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#2 /var/www/html/vendor/guzzlehttp/guzzle/src/Handler/CurlHandler.php(47): GuzzleHttp\Handler\CurlFactory::finish(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#3 /var/www/html/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php(28): GuzzleHttp\Handler\CurlHandler->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#4 /var/www/html/vendor/guzzlehttp/guzzle/src/Handler/Proxy.php(48): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#5 /var/www/html/vendor/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php(35): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#6 /var/www/html/vendor/guzzlehttp/guzzle/src/Middleware.php(31): GuzzleHttp\PrepareBodyMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#7 /var/www/html/vendor/guzzlehttp/guzzle/src/RedirectMiddleware.php(71): GuzzleHttp\Middleware::GuzzleHttp\{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#8 /var/www/html/vendor/guzzlehttp/guzzle/src/Middleware.php(63): GuzzleHttp\RedirectMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#9 /var/www/html/vendor/guzzlehttp/guzzle/src/HandlerStack.php(75): GuzzleHttp\Middleware::GuzzleHttp\{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#10 /var/www/html/vendor/guzzlehttp/guzzle/src/Client.php(331): GuzzleHttp\HandlerStack->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#11 /var/www/html/vendor/guzzlehttp/guzzle/src/Client.php(168): GuzzleHttp\Client->transfer(Object(GuzzleHttp\Psr7\Request), Array)
#12 /var/www/html/vendor/guzzlehttp/guzzle/src/Client.php(187): GuzzleHttp\Client->requestAsync('GET', Object(GuzzleHttp\Psr7\Uri), Array)
#13 /var/www/html/application/libraries/DnApiClient.php(55): GuzzleHttp\Client->request('GET', 'ea/providers/ef...')
#14 /var/www/html/application/models/Insurances_model.php(32): DnApiClient->get('ea/providers/ef...')
#15 /var/www/html/application/controllers/Appointments.php(194): Insurances_Model->get_available_insurances('ef91feb457d28eb...')
#16 /var/www/html/vendor/codeigniter/framework/system/core/CodeIgniter.php(533): Appointments->index()
#17 /var/www/html/index.php(341): require_once('/var/www/html/v...')
#18 {main}

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