A recent update to the 3rd party app Microsoft PowerToys introduced a new feature called "Video Conference Mute". This setting is enabled by default and may prevent NVIDIA Broadcast from launching correctly. To resolve this issue:
1. Open Microsoft PowerToys and navigate to the Video Conference Mute section from the left column
2. Disable the setting "Enable Video Conference Mute" as shown in the screenshot below.
3. Restart NVIDIA Broadcast.