Need help in handling "User denied permission to use device"

I’m new to Jitsi and I’m trying to use lib-jitsi-meet to create a conference in my react app. I’ve been able to create a conference using example.js in the docs but while I was testing it with a friend who has his webcam disabled and it threw an exception

Any comments on how and where to handle this exception so people who have webcam disabled can also join.