Paypal in the Fundraising Plugin in the Live Mode

Hello,

I am trying to set up paypal on my new plugin in the live mode. I keep getting the following message:

There was a problem connecting with the paypal gateway. (CODE)560029 The required X-PAYPAL-APPLICATION-ID header is missing from the HTTP request

I am not sure how to fix this. I have researched and tried to find similar posts, but I have not found anything useful.