Lambda@Edge function Fails to Execute using Viewer Request Trigger from Cloudfront

My function does not seem to ever execute on accessing my website through the cloudfront servers. Testing the function works as expected, and creates logs in cloudwatch as expected, but I have not been able to trigger the function from Cloudfront.

I followed the instructions from this blog https://levelup.gitconnected.com/nonce-based-csp-with-aws-cloudfront-ae5a6752b9b0

I'm wondering if I'm missing a permission issue or something, but I can't figure it out.

Any help is appreciated

Here are the trust relationships and permissions, respectively

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "Service": [
                    "edgelambda.amazonaws.com",
                    "lambda.amazonaws.com"
                ]
            },
            "Action": "sts:AssumeRole"
        }
    ]
}

{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Effect": "Allow",
			"Action": "logs:CreateLogGroup",
			"Resource": "arn:aws:logs:xxxxx:*"
		},
		{
			"Effect": "Allow",
			"Action": [
				"logs:CreateLogStream",
				"logs:PutLogEvents"
			],
			"Resource": [
				"arn:aws:logs:xxxxx:*"
			]
		},
		{
			"Action": "s3:GetObject",
			"Effect": "Allow",
			"Resource": "*"
		}
	]
}

Thanks,

Liam