[snowpack] TypeError [ERR_INVALID_ARG_TYPE]: somehow it doesn't work for me

[deleonio]

Did you have a demo project? Okay -> https://github.com/phantasmalmira/AngularSnowpackDemo

[SilverMira]

It looks like you're missing projects.<projectname>.architect.build.options.polyfills in angular.json, can you confirm that?