Closed Captioning throwing: ERROR: Missing or invalid PHY

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When I enable closed captioning in my code, I now get the error: ERROR: Missing or invalid PHY

I searched around and everything seems to suggest a missing asset but this is not the case. (double and triple checked although pointless as the only change is listed below)

This is my code that throws an error:

    ' Build videoclip metadata
    metaData = {
        ContentType: "episode"
        Title: tr("Network in English")
        minBandwidth: 20
        Stream: {
            Url: "http://siteURL.com/JSMPkg/playlist.m3u8"
         }   
        StreamFormat: "hls"
        SubtitleConfig: {
            TrackName: "eia608/1"
        }     
    }

This is what it was with NO error.

    ' Build videoclip metadata
    metaData = {
        ContentType: "episode"
        Title: tr("Network in English")
        minBandwidth: 20
        Stream: {
            Url: "http://siteURL.com/JSMPkg/playlist.m3u8"
         }   
        StreamFormat: "hls"
    }

Just by adding

SubtitleConfig

it now throws the ERROR: Missing or invalid PHY error message.

Closed Captioning is provided by the streaming service and works on all devices (even Roku but it throws: ERROR: Missing or invalid PHY)

Any ideas or suggestions? Am I perhaps missing another parameter?

I already added the

minBandwidth

option but still no luck

Will this error prevent me from getting my channel published?

Thanks for any input you can provide.