How do I fix this issue?

[UnknownUW]

There is an issue that I don't understand can you explain why this error is showing up in my console.

[Takiyo0]

your nodejs version is outdated. You need at least v16 to run. If you're using repl.it, do these steps.

1. Go to shell, and type npm i node@16
2. Now, on your repl.it config, instead of using node index.js, use this npx node@16 index.js