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https://issues.apache.org/jira/browse/AIRFLOW-4507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16838852#comment-16838852
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James Meickle commented on AIRFLOW-4507:
----------------------------------------

I tracked this down to here:

def configure_manifest_files(app):
    """
    Loads the manifest file and register the `url_for_asset_` template tag.
    :param app:
    :return:
    """

    def parse_manifest_json():
        # noinspection PyBroadException
        try:
            global manifest
            manifest_file = os.path.join(os.path.dirname(__file__),
                                         'static/dist/manifest.json')
            with open(manifest_file, 'r') as f:
                manifest.update(json.load(f))

                for k in manifest.keys():
                    manifest[k] = os.path.join("dist", manifest[k])
        except Exception:
            print("Please make sure to build the frontend in "
                  "static/ directory and restart the server")
            pass


We were getting this print message (not a logger, not an exception?!) telling 
us that this failure condition was being hit. Still investigating but thought 
I'd update with where we got so far.

> UI DAG status circle icons not displaying
> -----------------------------------------
>
>                 Key: AIRFLOW-4507
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-4507
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: ui
>    Affects Versions: 1.10.3
>            Reporter: Joshua Kornblum
>            Priority: Critical
>         Attachments: chrome.png, edge.PNG, firefox.png
>
>
> I upgraded our Airflow from 1.10.1 to 1.10.3 and the UI is no longer 
> displaying the status circles on the `/home` page. I've tried viewing these 
> on Ubuntu (Chrome, FireFox) and Windows 10 (Edge) all do not display them. 
> This is running behind nginx (so I hope its not an nginx config issue, if so 
> I will take this issue down)
> I see Edge and Chrome complain about some fonts not being able to load but 
> HTML inspection makes it look like those status circles are SVG so I'm not 
> sure it's related.



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