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;" key="login" uri="" uuid="8AFC7FD4-CBFB-11F1-AAD9-47130C50D6CE">
    <field name="username" id="uuid-8AFCB31E-CBFB-11F1-AAD9-47130C50D6CE" attrs="" key="username" display="Username" widget="text" value=""/>
    <field id="uuid-8AFCFE82-CBFB-11F1-AAD9-47130C50D6CE" name="password" widget="password" attrs="" display="Password" key="password"/>
    <field value="" widget="submit" attrs="" key="submit" display="Login" id="uuid-8AFD4DF6-CBFB-11F1-AAD9-47130C50D6CE" name="submit"/>
  </form>
</response>