Netflix Error D7020

If you see the error code D7020 on your computer, often accompanied by the following message:

Pardon the interruption
Looks like you're viewing Netflix from more than one browser or tab. Please close any extra browsers or tabs, then reload the page. If that doesn't fix the issue, you may need to restart your computer.

It usually means that you have Netflix open in more than one place. Follow the troubleshooting steps below to solve the problem.