Bad "package.json" file in WEBIDE Custom Template Extension

Hi,

I'm following this tutorial below for the creation of a customer SAP WebIDE template

Create your own SAP Web IDE template – Share your template

When activating the extension, I'm having this error for bad "package.json" file. Does someone have an idea on the error? The plugin did run correctly when I tried it on WEBIDE (Run as WEBIDE Extension).