Hello

j3.4.1
cb2.0.9
cbsubnightly from 21/05/2015

I have setup paypal gateway and a paypal sandbox
user registers, comes to the paypal site, logs in, pays an sees the screen where paypal says :

...
Votre paiement d'un montant de €10,00 EUR a été effectué.
Vous allez maintenant être redirigé vers test facilitator's Test Store.

So it is supposed to come back to my site.

What i get is a screen saying : INVALID
(the url is something like : http://mysite/index.php/cb-registration/pluginclass?plugin=cbpaidsubscriptions&cbpgacctno=1&cbppdtback=xxx&cbpbasket=4&result=success&cbpid=yyy

I have setup on the sandbox vendor account :
"Renvoi automatique" activated
I put in my sites URL : kind of mysite.fr/

Perhaps I have to put in a more specific URL ?
Or do I have to setup cbsub for this return URL ?

On the sandbox the payment is registered,
but in CB Paid Subscriptions: Subscriptions the status of this user is "Registered Unpaid"

Please help !

I already used the sandbox accounts for another project and I think they should work

I again went through paypal gateway configuration in cb doc 7.4.1 and I think its ok - here the principal setups I made :
Enable single payment
PayPal Sandbox server
PayPal Account and PDT Identity token (required) : mail & token

Here is the log information you told me to look at.

Ok I checked my paypal preferences :
I had not IPN enabled which is done now (I had to enter an URL so I put in the url of my site - if this needs to be more specific let me know)
And PDT setup was not complete which is done now

Now after paypal I come back to the site which is fine but I get this error message :

Désolé, mais votre paiement n'a pu être traité. Résultat de la transaction:FAIL Error: 4020. Veuillez retenter et informer les administrateurs du site.
Aucun panier appropriée trouvé.

In the payment notifactions I get :

Notification type PDT notification not authenticating at payment gateway

and this raw data :

Raw result FAIL
Raw data $_GET=array (
'plugin' => 'cbpaidsubscriptions',
'cbpgacctno' => '1',
'cbppdtback' => 'xxx',
'cbpbasket' => '7',
'result' => 'success',
'cbpid' => 'xxx',
'tx' => 'xxx',
'st' => 'Completed',
'amt' => '10.00',
'cc' => 'EUR',
'cm' => '7',
'item_number' => 'S17-549-2',
'option' => 'com_comprofiler',
'view' => 'registers',
'Itemid' => '113',
'task' => 'registers',
);
$_POST=array (
);
$transaction_info='FAIL
Error: 4020';
$PDT_RESULT=array (
0 => 'Error: 4020',
);

I read some other posts related, checked all the Ids but can't find anything wrong (in my eyes)