The Angular Compiler requires TypeScript >=2.7.2 and <2.8.0 but 2.8.3 was found instead

Question

I starting getting this error on my Angular app:

The Angular Compiler requires TypeScript >=2.7.2 and <2.8.0 but 2.8.3 was found instead

Answer 1

In your project folder run again npm install typescript@2.7.2 as stated from here:

Want to upgrade project from Angular v5 to Angular v6

Then it should work.