This article will guide you to resolve Camera and Microphone permission issues you may encounter when using Calldacity web. It lists the steps for allowing these permissions on the common browsers, Chrome, Firefox, and Microsoft Edge, for both MAC and Windows operating systems.
See image below.

Chrome's Mic and Cam Permissions for Windows

To change a site's camera and microphone permissions,
Open Chrome .

At the top right, click on the dots  then Settings.

Click Privacy and security, then Site settings, then Camera or Microphone.

Select "Sites can ask to use your camera".

NOTE: you must have administrative privileges on the computer to address these setting changes.

Chrome's Mic and Cam Permissions for MACs

Google Chrome updates almost constantly, and many times without warning. If you use Google Chrome for Mac, update issues can be compounded by the fact that Apple implements permissions a little differently – and sometimes more strictly – than other platforms.

If you are experiencing any of the following issues in Calldacity Meet while using Chrome for Mac, please refer to the below fixes:

• Permissions to use your browser/computer’s audio -select ALLOW
• Permissions to use your browser/computer’s video -select ALLOW
• Error when trying to share your screen or browser

Under System Preferences, go to: Security & Privacy

then, select the Privacy Tab

Under Screen Recording, deselect the check box for Chrome, Chrome will close. Then, click on the check box again to select Chrome, you will be asked to quit and restart Google Chrome.

select Quit Now

Restart Chrome. Calldacity Meet screen-sharing ability will be activated.

Firefox's Mic and Cam Permissions for Windows

Use the Firefox settings menu to change camera and microphone permissions

To change camera permissions,

Click the menu button  and select Settings.
Then click Privacy & Security from the left menu.

Scroll down to the Permissions section.
Then click the Settings button for the Camera option

Firefox displays the websites with saved "Allow" or "Block" permissions.

Select the Block new requests asking to access your camera checkbox if you do not want to give any other sites access to your camera.

Then click on Save Changes.

To change the Microphone permissions, select the Microphone option, and repeat the steps above.

Firefox's Mic and Cam Permissions for Mac

To update your macOS Camera or Microphone settings follow these instructions:

Under System Preferences, go to: Security & Privacy

then, select the Privacy Tab

Scroll down to select Camera. then select the checkbox next to your web browser (Firefox) to allow it to access your camera.

Edge Mic and Cam Permissions for Windows

In Microsoft Edge, click on the dots  then Settings.

On the left side menu, select Cookies and Site Permissions.

Scroll to All Permissions, select Camera or Microphone.

Make sure the "Ask before accessing" toggle is turned on.

Repeat the steps above for Microphone access.