To install and launch Gamecaster, you are required to download and install the Windows Media Foundation Pack. You'll likely be missing this if you are running on an N version of Windows 10, and can be installed by heading here:
https://www.microsoft.com/en-us/software-download/mediafeaturepack
https://www.microsoft.com/en-us/software-download/mediafeaturepack
Updated on: 05 / 04 / 2022