I get this error in the top left corner of the Media player only after it completely finishes:
Error loading this resource

The error does not show up in the console, only in the media player. 

I have tried variations of the JSON based on example.json—with/out _playerOptions, with/out poster image, etc—but so far have found no configuration that eliminates the error. 

Has anyone seen this? or see an error in my JSON?

I'm using the latest version of the framework (standalone) and of the Media component.

Here's my JSON:

{
"_id":"c-13",
"_parentId":"b-13",
"_type":"component",
"_component":"media",
"_classes":"",
"_layout":"full",
"title": "Test Media",
"displayTitle": "Test Media",
"body": "This Media component is Trickled. There are three options for indicating component completion and subsequently triggering Trickle: 'inview', 'play', and 'end'.",
"instruction": "Select the play button to watch a short video about providing feedback.",
"_setCompletionOn":"ended",
"_useClosedCaptions":false,
"_startLanguage":"en",
"_media": {
"mp4": "course/en/video/c-150.mp4",
"poster": "course/en/video/c-150.jpg"
    },
"_transcript": {
"_inlineTranscript": true,
"_externalTranscript": false,
"inlineTranscriptButton": "View Transcript",
"inlineTranscriptCloseButton": "Hide Transcript",
"inlineTranscriptBody": "This is the area in which the user will read along with the video."
    },
"_playerOptions": {
"poster": "course/en/video/c-150.jpg",
"showPosterWhenEnded": true
    },
"_pageLevelProgress": {
"_isEnabled": true
    }
},

 Thanks!