That's an Instant TV Channel error code. The first 2 digits identify the error, the last 8 characters are the channel ID. If the "30-" error is occurring on a single device it usually indicates a network problem. If it occurs on all devices it usually indicates a problem with the channel's S3 configuration bucket, for example a missing or altered file.
If you need any additional information about this please email me at scott at InstantTvChannel dot com.
www.InstantTvChannel.com / www.InstantSubtitles.com - 717-441-4386 - Build a Roku SDK channel in 15 minutes! Easily and inexpensively generate subtitles!