Hey, I try to use the Traffic Report given in the Analytics API in my php tool, but when I try to execute the apicall the following error appears.

SSL read: error:00000000:lib(0):func(0):reason(0), errno 0

I don't know what's happening here, because calls from other apis also returns the requested data.

The call also works in the Api-test-tool.

This is the call:

 function call_traffic_report(){
     
     $token = "validOAuthToken";
     
     $param = "filter=marketplace_ids:%7BEBAY_US|EBAY_DE%7D,listing_ids:%7B_id_1|_id_2_%7D,date_range:%5B20170614..20170624%5D&";
     $param .= "dimension=LISTING&";
     $param .= "metric=LISTING_IMPRESSION_TOTAL";
 
     $connection = curl_init();
     
     
     curl_setopt($connection, CURLOPT_HTTPGET, true);
     curl_setopt($connection, CURLOPT_URL, "https://api.ebay.com/sell/analytics/v1/traffic_report?". $param);
     curl_setopt($connection, CURLOPT_HTTPHEADER, array("Authorization: Bearer ". $token,
             "Accept:application/json",
             "Content-Type:application/json"
     ));
     
     $response = curl_exec($connection);
     
     if(curl_errno($connection)){
         echo 'Curl error: ' . curl_error($connection). "<br>";
     }
     
     var_dump($response);
     
     curl_close($connection);
     
     if($response!= null){
         $dec_resp = json_decode($response);
         var_dump($dec_resp);
     }
 }