[Issue] Undefined error with moodle 3.8.5

[JaVolimKatarinu]

Hi,
I have recently downloaded moodle 3.8.5 and moodle-webhooks 3.0.5 ( Build: 2020051600) and after setting webhook up, it wasn't working. I have checked moodle logs and haven't found help there, except information that there was an error sending request. Webhook has been tested, that part is working. So, I assume the issue is within plugin for handling webhooks.

Let me know if you need any more informations.

[cladelpino]

To get more information about the server response, you can use the technique I described in #23