Cannot find module '@angular/forms' or its corresponding type declarations.ts(2307)

Question

I just ran an 'npm update' on my project and some errors occured by the 'import' parts of some ts components like this (and of course tons of compilation errors):

What should I do now? How can I modify the code, or turn it back to work the imports again? Thanks in advance!

Answer 1

By stopping 'ng serve' and start it again solved the problem.