camera or mic doesn't work on chrome on facebook

Hi,

I need some assistance, please. I'm trying to video call on facebook, in Google Chrome, and I get the message that either the camera or mic are not allowed.

I've video-called before, without having to install anything or give any permissions. In the meantime, except for automatic updates, I don't think there have been any. So it's hard for me to figure out why.

One last mention: I have edited the Chrome preferences and allowed the camera and mic, still nothing.

Looking forward to your answer, thanks!