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 key="login" method="post" uri="" encoding="&#x2713;" uuid="10187A68-453A-11F1-AF3C-3C0AF9248A5F">
    <field key="username" display="Username" widget="text" attrs="" value="" id="uuid-1018AEAC-453A-11F1-AF3C-3C0AF9248A5F" name="username"/>
    <field id="uuid-1018F4D4-453A-11F1-AF3C-3C0AF9248A5F" name="password" key="password" widget="password" attrs="" display="Password"/>
    <field id="uuid-10193FCA-453A-11F1-AF3C-3C0AF9248A5F" name="submit" value="" display="Login" attrs="" widget="submit" key="submit"/>
  </form>
</response>