Fixed wrong user variable in lookup.html template for edit link (was user should be found_user).
There is no DeveloperForm in site/user/profile.py changed that to LookupForm.
{% autoescape off %}<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
{% for location in sitemaps %}<sitemap><loc>{{ location|escape }}</loc></sitemap>{% endfor %}
</sitemapindex>
{% endautoescape %}