Custom function extension app error

I have created Function extension in custom app and deploy and run dev and all thing have succussed but when I am adding rule in checkout setting its showing error.

An error occurred when creating App Checkout Validation

Hi @Ravi_Pandey

It’s hard to determine exactly what is happening here. You can use the Shopify CLI to replay failed executions locally with shopify app function replay . This lets you check the logs for:

  • TimeoutError
  • RunError
  • InvalidOutputError
  • InvalidVariableValueError
  • UnsupportedError

These errors will give you more details about what went wrong.