Sample code signature run localy but failed on heroku

i use sample code from and work when use it locally ( localhost ) but when i try to upload it to heroku, and set key and secret, but got an error

Failed to load resource: the server responded with a status of 404 (Not Found)

Which version?
“dependencies”: {
“body-parser”: “^1.19.0”,
“cors”: “^2.8.5”,
“dotenv”: “^8.2.0”,
“express”: “^4.17.1”

To Reproduce(If applicable)
Steps to reproduce the behavior:
i try to add favicon.ico this also failed

PC (please complete the following information):

  • Browser: Chrome

Hey @ptcmi,

What is your signature endpoint? Let me know and I can test it.


i try to remove and re-deploy to heroku, when i run the app still get an error when inspect with chrome, but when i use postman to call end point i got result ,
so i just ignore the error.

thank you

Happy to hear you got it working! :slight_smile: