Monocle error message

gistfile1.txt

There was a problem trying to load the channels from your Microsub endpoint.

    Microsub endpoint: https://aperture.p3k.io/microsub/53
    Your website: https://matpacker.com/

The endpoint returned the following response.

{
    "code": 403,
    "header": "HTTP/1.1 403 Forbidden\r\nServer: nginx/1.14.0\r\nContent-Type: application/json\r\nTransfer-Encoding: chunked\r\nConnection: keep-alive\r\nX-Powered-By: PHP/7.2.7-1+ubuntu16.04.1+deb.sury.org+1\r\nCache-Control: no-cache, private\r\nDate: Wed, 25 Jul 2018 23:37:15 GMT",
    "body": "{\"error\":\"forbidden\",\"error_description\":\"The token endpoint could not verify this access token\",\"token_endpoint\":{\"url\":\"https:\\/\\/matpacker.com\\/wp-json\\/indieauth\\/1.0\\/token\",\"code\":400,\"response\":\"{\\\"error\\\":\\\"parameter_absent\\\",\\\"error_description\\\":\\\"Bearer Token Not Supplied\\\"}\"}}",
    "error": "",
    "error_description": "",
    "url": "https://aperture.p3k.io/microsub/53?action=channels",
    "debug": "HTTP/1.1 403 Forbidden\r\nServer: nginx/1.14.0\r\nContent-Type: application/json\r\nTransfer-Encoding: chunked\r\nConnection: keep-alive\r\nX-Powered-By: PHP/7.2.7-1+ubuntu16.04.1+deb.sury.org+1\r\nCache-Control: no-cache, private\r\nDate: Wed, 25 Jul 2018 23:37:15 GMT\r\n\r\n{\"error\":\"forbidden\",\"error_description\":\"The token endpoint could not verify this access token\",\"token_endpoint\":{\"url\":\"https:\\/\\/matpacker.com\\/wp-json\\/indieauth\\/1.0\\/token\",\"code\":400,\"response\":\"{\\\"error\\\":\\\"parameter_absent\\\",\\\"error_description\\\":\\\"Bearer Token Not Supplied\\\"}\"}}",
    "headers": {
        "Server": "nginx/1.14.0",
        "Content-Type": "application/json",
        "Transfer-Encoding": "chunked",
        "Connection": "keep-alive",
        "X-Powered-By": "PHP/7.2.7-1+ubuntu16.04.1+deb.sury.org+1",
        "Cache-Control": "no-cache, private",
        "Date": "Wed, 25 Jul 2018 23:37:15 GMT"
    },
    "rels": []
}