this.tsApi.isNode is not a function

[chef88val]

I'm trying to execute this demo https://github.com/hediet/vscode-debug-visualizer/blob/master/demos/js/src/demo_fetch.js and I get this error

The file is js extension

What i'm doing wrong?

Thanks!

[ghnoob]

Possible duplicate of #231
Are you using TypeScript 5.6? If yes, downgrade to TS 5.5 and it will work.