I tried sending my own request to the webhook, however it worked very well. Any ideas why I receive this problem and how to solve it? Thank you in advance.
The best thing to do in this situation is to look at your server logs (the server hosting the webhook). They should be able to tell you why you’re getting a status 500 code. There’s something different between what your server is expecting and what ERPNext is sending, but it’s impossible to tell what that is without knowing more about how the webhook inputs are being processed.