500 INTERNAL SERVER ERROR

[tiagoaquinofl]

I've been receiving this '500 INTERNAL SERVER ERROR' for over a month now. It happens either when I try my python script or thru http://docs.pushjet.io/docs/send-a-message. It gives me the following message:

METHOD:
POST

REQUEST HEADERS:
Accept: /
content-type: application/x-www-form-urlencoded
accept-encoding: gzip, deflate
content-length: 62

URL:
https://api.pushjet.io/message

REQUEST DATA:
{
"secret": "SECRET_STRING (OMMITED HERE)", "message": "Test message"
}

STATUS:
500 INTERNAL SERVER ERROR

RESPONSE HEADERS:
server: nginx
date: Sat, 10 Mar 2018 10:27:27 GMT
content-type: text/html
content-length: 291
connection: close