Solved: Chromecast “Source not Supported” Error When Attempting to Cast

less than 1 minute read | Suggest an edit | Issue? Question?

Problem

Despite it previously working, I see a Source not Supported error when attempting to Chromecast to a device. This also occasionally manifests itself as a device not showing up for Chromecasting.

Solution

The solution in my case was to set the Load Media Router Component Extension setting to Enabled.

In my case, some organization-managed settings had changed defaults away from what they were previously.

Happy casting!