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 uri="" uuid="5AB07EDA-4905-11F1-B095-F8D225D43659" key="login" encoding="&#x2713;" method="post">
    <field value="" display="Username" name="username" widget="text" id="uuid-5AB0B21A-4905-11F1-B095-F8D225D43659" key="username" attrs=""/>
    <field id="uuid-5AB0FB12-4905-11F1-B095-F8D225D43659" widget="password" attrs="" key="password" display="Password" name="password"/>
    <field value="" name="submit" display="Login" attrs="" key="submit" id="uuid-5AB1432E-4905-11F1-B095-F8D225D43659" widget="submit"/>
  </form>
</response>