How do l fix the error below? I have a good token, I've changed it twice

CodePudding user response：

I've changed it twice

That's a syntax error. The value of the token is irrelevant: the version of Node.js you're using doesn't understand the nullish assignment operator, ??=.

It looks like support for ??= was added to Node.js somewhere during the v15 development cycle. Since Heroku supports even-numbered (long-term support) versions, you'll want to use Node.js version 16.

You can specify the version of Node.js you wish to use via your package.json, e.g.

{
  "name": "Some Application",
  "description": "An application that does cool stuff",
  "version": "1.0.0",
  "engines": {
    "node": "16.x"
  }
}

Update (or set) the node version in your package.json, commit, and redeploy.