In most browsers, refreshing the page should do the trick. If this doesn’t help, you can try the “hard” update using ctrl + shift + R on Windows, or shif + cmnd + R on iOS. The browser should automatically prompt you again to grant access to the camera and microphone. If neither helps, please try the more detailed instructions below, or try opening the site in another of the supported browsers.
The camera icon should be visible in the URL entry bar on the right. After clicking on it, it is possible to grant the site the necessary permissions.
Just select the “always allow” option and then refresh the page again.