app proxy giving 404

[canjozef]

I have an API with ngrok and I'm trying to use it with a shopify proxy. Here are the details:

API url: http://XXXXXX.ngrok.io

the code that generates the API:

app = Flask(__name__, template_folder='/content')
run_with_ngrok(app)
CORS(app)
app.config['JSONIFY_PRETTYPRINT_REGULAR'] = False

@app.route("/hadikardesim", methods=["POST", "GET"])
def postME():
  data = request
  print(data)
  return jsonify('NA DA') 

Here are my proxy details:

However, my site constantly return URL not found (404). Does any one know how I can fix this issue?