When you try having a video call on Facebook, you may get an error message stating, 'An error occurred when trying to get access to Camera and/or Microphone: Hardware Access Error.' Why Can't Facebook Messenger Access Your Webcam? Here, we will try to help you fix this problem. However, many users are baffled when their webcam doesn't work when making a video call. 4 Ways to Fix Facebook Messenger Webcam Not Workingįacebook Messenger allows users to communicate with each other via video call.