XSLT Error

Empty filename at /home/ubuntu/perl5/perlbrew/perls/perl-5.18.0/lib/site_perl/5.18.0/Chameleon5/Template/XSLT.pm line 575.

Response XML

<?xml version="1.0"?>
<response>
  <form encoding="&#x2713;" uuid="782A6D6A-94F4-11F0-9256-74F92F49FC8C" method="post" uri="" key="login">
    <field attrs="" name="username" value="" widget="text" key="username" id="uuid-782AA1F4-94F4-11F0-9256-74F92F49FC8C" display="Username"/>
    <field attrs="" name="password" widget="password" id="uuid-782AEAA6-94F4-11F0-9256-74F92F49FC8C" key="password" display="Password"/>
    <field attrs="" name="submit" widget="submit" value="" display="Login" id="uuid-782B3ED4-94F4-11F0-9256-74F92F49FC8C" key="submit"/>
  </form>
</response>