As some of you already noted, there have been some issues with getting the channel-list from the KabelDeutschland API. They migrated to a new Content-Delivery-Network which does not support a get-header-Request anymore. This causes the proxy to generate invalid channel-links and your were unable to watch the streams.
This should be fixed by now. I committed the fix within the PHP and the GO version of the proxy and also compiled the binaries to a new version 0.1.3.
Please give me feedback if the problem is solved for you.