500 Internal Server Error When Push Json To Firebase With Flask

Question

I get 500 internal server error when push json data from postman to firebase with flask, can anybody help me?

the json data i have posted like this {"suhu": "20.3","lembab": "50%"}

here my flask code

@app.route('/')
def hello():
    return 'Welcome'

@app.route('/data', methods = ['POST'])
def esp():
    content = request.json
    nilai = jsonify(content)
    db.child("Monitoring").push(nilai)
    return nilai

when i comment db.child("Monitoring").push(nilai) and return nilai the output is {"lembab": "50%","suhu": "20.3"}

It says 500 internal server error when i push the json data to firebase