Angular 4 HTML template 'of' expected error

I created material table according to official documentation here - https://material.angular.io/components/table/overview.

But in my template WebStorm shows error like this:

How can I suppress this "of expected" error?

P.S. Template works properly, data rendered as it should be. So, I am sure the syntax correct.

There are just lots of errors displayed in my template file.