Asset Pack Creation Fail: Error reading Manifest.json

Hello,

I've been following the Background Assets documentation, and so far everything has worked. However, when I attempt to archive my asset pack in Terminal, I receive the following error:

Error: Reading the contents of the file at “Manifest.json” failed.

I've double checked the provided instructions, tried archiving in different directories, and tried every permutation of Manifest.json I could think to try. Same error every time.

Here's my Manifest.json code in case the issue is there. Thanks in advance!

	"assetPackID": "classic",
	"downloadPolicy": {
		"essential": {
			"installationEventTypes": [
				"firstInstallation"
			]
		}
	},
	"fileSelectors": [
		{
			"directory": "audio"
		},
	],
	"platforms": ["tvOS"]
}