requestAnimationFrame error

I get the following error when I click the hamburger looking button.

Screenshot from 2019-12-08 05-15-14

TypeError: "'requestAnimationFrame' called on an object that does not implement interface Window."

After clicking it, the button disappears.

Screenshot from 2019-12-08 05-15-26

I have no idea what that button is for. I just configured my GitLab to integrate with SourceGraph. Maybe it has something to do with it.