Paypal Sandbox - After payment white page

Hi, I have tested the paypal gateway. The amount and so on will be correct transfered. But after payment the backlink doesn´t work.

itservice.kleeberg.biz/itclub/profil/pluginclass?plugin=cbpaidsubscriptions&cbpgacctno=2&cbppdtback=c762335277d93f85a1f882d58e8134e3&cbpbasket=106&do=gw&result=success&cbpid=cbp57c4cf0d3162d410615885

The page is white. Please can you support me?

Best regards!

Michael

Enable debug mode and maximum error reporting in Joomla global configuration then retest to see if any errors output. Visiting that URL also goes directly to a Joomla login page, which is not correct. It should not send to login at all which means you probably don't have the mandatory public and published Joomla menu item to CB.

Please read the CB Primer Book for configuration and initial setup help followed by the CBSubs Manual. Both can be found below.

www.joomlapolis.com/downloads/documents

Hi Krileon,
sorry - but I have read the books more than one time. But there is an other issue. The paypal sandbox works in other extensions fine, only not in CBsubs.
Should I send you the account credentials for looking up?
Thank for your fast support.
Michael

Notification's raw data
Raw result COMMUNICATION ERROR
Raw data $_GET=array (
'option' => 'com_comprofiler',
'view' => 'pluginclass',
'plugin' => 'cbpaidsubscriptions',
'cbpgacctno' => '2',
'cbppdtback' => 'c762335277d93f85a1f882d58e8134e3',
'cbpbasket' => '120',
'do' => 'gw',
'result' => 'notify',
'cbpid' => 'cbp57c5e4e0e002e791649278',
'format' => 'raw',
'Itemid' => NULL,
'task' => 'pluginclass',
);
$_POST=array (
'mc_gross' => '11.90',
'invoice' => 'U138',
'protection_eligibility' => 'Ineligible',
'payer_id' => 'W7QR4XDSJE4R8',
'tax' => '0.00',
'payment_date' => '12:56:50 Aug 30, 2016 PDT',
'payment_status' => 'Completed',
'charset' => 'windows-1252',
'first_name' => 'test',
'mc_fee' => '0.58',
'notify_version' => '3.8',
'custom' => '120',
'payer_status' => 'verified',
'business' => 'michael-facilitator@kleeberg.biz',
'quantity' => '1',
'verify_sign' => 'ACUe-E7Hjxmeel8FjYAtjnx-yjHAAoORu8.t3w.RXsHPMVkkwGx9bBL8',
'payer_email' => 'michael-buyer@kleeberg.biz',
'txn_id' => '7MR26695KN288620P',
'payment_type' => 'instant',
'last_name' => 'buyer',
'receiver_email' => 'michael-facilitator@kleeberg.biz',
'payment_fee' => '',
'receiver_id' => 'E6PJ4SB566AHE',
'txn_type' => 'web_accept',
'item_name' => 'myJACK Training 2016/KW 36 für tester2@kleeberg.me',
'mc_currency' => 'EUR',
'item_number' => 'S253-1020-11',
'residence_country' => 'DE',
'test_ipn' => '1',
'handling_amount' => '0.00',
'transaction_subject' => '',
'payment_gross' => '',
'shipping' => '0.00',
'ipn_track_id' => '436c8c35c56f5',
);
$error='0';
$status='400';
$transaction_info='';

Status 400 means the HTTP request failed with Bad Request. Are you using PayPal Standard, Pro, or Advanced? If the basket complete page can not be reached (as it appears to be unreachable on your site due to access permissions) then the basket can't be paid by return or by IPN. You've an access issue somewhere. Ensure CB Paid Subscriptions is public and published in CB > Plugin Management. Ensure you've a public and published Joomla menu item to CB. If you've a menu item to CBSubs ensure it's also public.

Everything you wrote i made. I use paypal standard. Can I send you credentials, for looking yourself?