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="0457B070-99BB-11F0-BFEB-4A1155FD9ABD" key="login" encoding="&#x2713;">
    <field attrs="" key="username" name="username" value="" widget="text" display="Username" id="uuid-0457E19E-99BB-11F0-BFEB-4A1155FD9ABD"/>
    <field display="Password" widget="password" id="uuid-0458296A-99BB-11F0-BFEB-4A1155FD9ABD" name="password" attrs="" key="password"/>
    <field id="uuid-045873F2-99BB-11F0-BFEB-4A1155FD9ABD" display="Login" widget="submit" value="" attrs="" key="submit" name="submit"/>
  </form>
</response>