Error while opening a folder in Adobe Bracket for custom widget.

Hi All,

I'm trying to open pre-defined widget in Adobe Bracket to customize it. But I'm unable to do so. I'm getting the following error . the directory is not the source directory of a custom widget .

I have downloaded the HTMLSnippet zip file from GitHub and opened it in Adobe Brackets. But it is not generating the MPK file . It is showing the above error