For setting up a clear key using JWT tokens

For setting up a clear key using JWT tokens

Hello,
Content playback using the ClearStreamingOnly policy was successful.
But, creating a content key policy with a clear key and then playing back the content results in an error.
The version of MKPlayer I am using is v1.6.0.
The source displayed in the browser console looks like this:
[MKPlayer: DBG]: Starting playback with source: {
    "title": "",
    "description": "",
    "poster": "",
    "hls": "https://ep-*****.japaneast.streaming.mediakind.com/********-****-****-****-************/manifest.ism/manifest(format=m3u8-cmaf,encryption=cbc)",
    "dash": null,
    "options": {
        "headers": {
            "Authorization": "Bearer=ey******...."
        }
    }
}
The error is a blocked cross-origin request. 
Header 'authorization' not allowed due to header 'Access-Control-Allow-Headers' from CORS preflight response
Please tell me what I am doing wrong and what I am missing.

Thank you,

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