[3.0] All declarations of 'WeakMap' must have identical type parameters


I’ve just created a new application using the following command for Ionic 3.0.

ionic start myApp --v2
cd myApp
yarn install
ionic serve

The result of creating executing the application right after creation without any modifications is this http://imgur.com/a/Qm22A.

Is that a know issue and is there a solution for this?