Hi, I saw this thread and thought that's exactly the same problem I have, so I wanted to provide a bit of information from my side. I have a self written PHP application to integrate the Rest API. I can successfully create a billing plan. But when trying to activate it the above Java exception is returned. This strikes me as strange as normally API errors are returned as such. Since this forum doesn't allow me to post my debug information, [here] is the link to my provisional test script. Maybe someone can help and tell me what is wrong here. Is this a PayPal problem or am I doing something wrong?
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