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="" method="post" uuid="2C9B5756-7CD9-11F1-B3FF-9FF3F8248A5F" encoding="&#x2713;" key="login">
    <field attrs="" widget="text" key="username" display="Username" name="username" id="uuid-2C9B8866-7CD9-11F1-B3FF-9FF3F8248A5F" value=""/>
    <field widget="password" key="password" attrs="" display="Password" name="password" id="uuid-2C9BD1F4-7CD9-11F1-B3FF-9FF3F8248A5F"/>
    <field display="Login" id="uuid-2C9C1B6E-7CD9-11F1-B3FF-9FF3F8248A5F" name="submit" value="" attrs="" widget="submit" key="submit"/>
  </form>
</response>