Starting the output failed - Source-Live error message

This article contains troubleshooting information

Starting the output failed. Please check the log for details. 
Note: If you are using the NVENC or AMD encoders, make sure your video drivers are up to date.

Source-Live | Low Latency | Monterey (macOS 12)

Description

When users attempt to start a new stream, they receive the following error:

Cause

The error message was displayed to users on MacOS Monterey before Source-Live LL was made compatible with that specific operating system.

Actions

In order to fix the error message:

1. Uninstall Source-Live LL 1.0.20 on Monterey.
2. If NDI runtime was already installed on your Mac before upgrading to Monterey, update the plugin: https://github.com/obs-ndi/obs-ndi/releases/tag/4.5.1
3. Install Source-Live 1.0.21 (version compatible with Monterey).
4. Launch Source-Live LL.
5. Start the stream again.

If you continue to receive the error message, contact the support team.