How can I take a screenshot on Netflix?

When I take a screenshot of a scene from a Netflix movie, it goes black. How do I adjust that it does not turn black? I was able to take screenshots before then I deleted Netflix and now it no longer works.

This is not possible because the content is protected, but you can try to screenshot it with an app

It does not work. Copyright

If you understand

Be careful that you can violate copyright law.

Activate window, press Alt + Print, paste the contents of the clipboard into any graphics tool, edit and save if necessary. Finished.

At least that's how it works with Firefox.