No platform exists for user agent OS "<undefined agentOsName>"

Describe the problem and steps to reproduce it:

I read the production logs.

What happened?

I saw:

{
    "Fields": {
        "msg": "No platform exists for user agent OS \"<undefined agentOsName>\""
    },
    "Logger": "amo",
    "Severity": 3,
}

What did you expect to happen?

I don’t know. Maybe it is a false positive but we should investigate why the user agent OS value is <undefined agentOsName>.

What to do?

We should change the log level of this message from error to warning by updating this block: https://github.com/mozilla/addons-frontend/blob/adb2ad0132798af9f5fee9e5c98c542265ba5b40/src/amo/components/PermissionsCard/permissions.js#L73-L77

Instead of calling log.error, we should call log.warn

[willdurand]

Ok, so I guess this is a wontfix since we don’t have the log entry anymore.

[willdurand]

@SeanPrashad you can try to use a tool like HTTPie to send request without a user agent.