paypal on multi store

Hi

I am attempting to setup paypal for my second store.

 I created the application in Paypal and took the client id and the secret

I went to the Business Account Settings and in business info go the Paypal Merchant ID 

When i hit the "create webhook" i get error invalid client??

Suggestions what am I missing here??

Regards 

Meir

I seem to have gotten the definitions and webhook set.. ( seems i needed to do an application restart)

But when i attempt to  do the payment via paypal i get the following error

A view component named 'Smartstore.OfflinePayment.PurchaseOrderNumberProvider' could not be found. A view component must be a public non-abstract class, not contain any generic parameters, and either be decorated with 'ViewComponentAttribute' or have a class name ending with the 'ViewComponent' suffix. A view component must not be decorated with 'NonViewComponentAttribute'.