I didn’t allow access to the camera/mic and popup doesn’t appear anymore

To reset your camera and microphone access for Chrome:

1.       Open Chrome.
2.       At the top right, click on 3 vertical dots, click on Settings.
3.       Click "Security and Privacy" on the left.
4.       Click "Site Settings"
5.       Scroll down to Permissions and select "Camera"
6.       Find your web site (app.boostlingo.com) and delete it by selecting the garbage can icon
7.       Do the same for Microphone
8.       Close Settings and make a call.
9.       On the top left pop-up should appear: click Allow.