<p>I've tried this on Firefox 71.0 (Slackware), Firefox (Android), and Chromium (Slackware).</p>
<p>When I attempt to sign up for an account on <a href="http://openstreetmap.org" rel="nofollow">http://openstreetmap.org</a>, I enter an email, a username, and a password, and then click the SIGN UP button. In response, I'm taken to <a href="https://www.openstreetmap.org/user/terms" rel="nofollow">https://www.openstreetmap.org/user/terms</a> and see this error message:</p>
<pre><code>Application error

The OpenStreetMap server encountered an unexpected condition that prevented it from fulfilling the request (HTTP 500)

Feel free to contact the OpenStreetMap community if your problem persists. Make a note of the exact URL / post data of your request.

This may be a problem in our Ruby On Rails code. 500 occurs with exceptions thrown outside of an action (like in Dispatcher setups or broken Ruby code)
</code></pre>
<p>The error is, so far, 100% reproducible for me (although a user in osm-dev IRC was able to sign up while I was asking about the error, so 0% reproducible for some).</p>

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