The "url" argument must be of type string. Received undefined

I am receiving this error during the deployment of my express/node app using App platform. Couldn’t figure what is the problem!


  "development": {
    "username": "postgres",
    "password": "10300",
    "database": "weblogin",
    "host": "",
    "dialect": "postgres",
    "logging": false
  "test": {
    "username": "root",
    "password": null,
    "database": "database_test",
    "host": "",
    "dialect": "mysql"
  "production": {
    "use_env_variable": "DATABASE_URL"

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Bobby Iliev
Site Moderator
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June 27, 2022

Hi there,

It sounds like the DATABASE_URL env variable is not defined. Have you added a bind variable to the app’s environment variables?

The variable should look as follows: