i have updated my app from @angular 4.13 to 6.1.0 version.
and i have upgrade @ionic/storage from 2.0.1 to 2.3.1, and there comes the problem
polyfills.js:3 Unhandled Promise rejection: Object(…) is not a function ; Zone: ; Task: Promise.then ; Value: TypeError: Object(…) is not a function
this is really frustrated. i don’t know how to fix this problem. any help please ?