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 method="post" encoding="&#x2713;" uuid="4B7E1666-8D07-11F1-BCFF-4F8125D43659" uri="" key="login">
    <field key="username" id="uuid-4B7E39B6-8D07-11F1-BCFF-4F8125D43659" attrs="" display="Username" name="username" value="" widget="text"/>
    <field widget="password" name="password" key="password" id="uuid-4B7E5982-8D07-11F1-BCFF-4F8125D43659" attrs="" display="Password"/>
    <field key="submit" display="Login" name="submit" attrs="" id="uuid-4B7E8146-8D07-11F1-BCFF-4F8125D43659" widget="submit" value=""/>
  </form>
</response>