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 uuid="88E1A4EC-726C-11F1-9832-75A5F8248A5F" method="post" uri="" encoding="&#x2713;" key="login">
    <field key="username" name="username" value="" id="uuid-88E1D714-726C-11F1-9832-75A5F8248A5F" display="Username" widget="text" attrs=""/>
    <field display="Password" widget="password" attrs="" key="password" name="password" id="uuid-88E22534-726C-11F1-9832-75A5F8248A5F"/>
    <field key="submit" name="submit" value="" id="uuid-88E270C0-726C-11F1-9832-75A5F8248A5F" display="Login" widget="submit" attrs=""/>
  </form>
</response>