Can't play video with DRM in custom web receiver app cast

I'm trying casting video with exoplayer cast to my web receiver app. In Exoplayer Default Receiver APP ID, video can play, but my custom receiver cant play. In CacTool, [ERROR] Detailed Error Code - 201. This is my receiver.js code

`context.getPlayerManager().setMessageInterceptor(
cast.framework.messages.MessageType.LOAD,
loadInterceptor);

function loadInterceptor(loadRequestData) {
if (loadRequestData.media && loadRequestData.media.customData &&
loadRequestData.media.customData['exoPlayerConfig']) {
exoPlayerConfig = loadRequestData.media.customData['exoPlayerConfig'];

if (exoPlayerConfig.licenseUrl) {
playerManager.setMediaPlaybackInfoHandler((loadRequest, playbackConfig) => {
playbackConfig.protectionSystem = exoPlayerConfig.protectionSystem;
playbackConfig.licenseUrl = exoPlayerConfig.licenseUrl;
playbackConfig.licenseRequestHandler = requestInfo => {
requestInfo.withCredentials = true;
requestInfo.headers = {
'origin': 'https://gstatic.com',
'access-control-allow-origin': 'https://gstatic.com'
};
return requestInfo;
};

return playbackConfig;
});
}
}

return loadRequestData;
}

context.start({playbackConfig: playbackConfig});
`

How to solve this? Thanks.