To fix when in the project directory run:
tsd install es6-shim -g
To fix when in the project directory run:
tsd install es6-shim -g
If you encounter this (behind a firewall etc.) and are on a Windows machine create a .tsdrc file with the below in it.
{
"strictSSL": false } https://github.com/DefinitelyTyped/tsd#tsdrc