Cannot import ReactiveFormsModule

[Sovai]

Hi, I try to use Angular reactive form but when I import in Login Module or App.module or even in Layout.module, it say like this:

core.js:1673 ERROR Error: Uncaught (in promise): TypeError: Cannot read property 'call' of undefined
TypeError: Cannot read property 'call' of undefined [...]

I have done some research and still cannot figure out how to solve this problem.Please help

[mrwfli]

please try to close the VS code and open again