Paypal: Invalid request: None of the fields are specified to identify a receiver

Hello Zorz.

We have got to send some payments through paypal. Finally it is looking like fine. It creates a list of helpers in the project info.

But if we click on the button “Collect Funding” just under the helpers list, we always get a javascript error, one popup for every helper profile, with the following text:

{"status":"fail","message":"Invalid request: None of the fields are specified to identify a receiver"}

We cannot find any place to check or fix those helpers profile and we cannot go further this step.

Could you please help us to understand what is going on here?

Thank you.