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="" uuid="5F00E7BE-97D4-11F0-8457-3F3CDBBCD7F8" encoding="&#x2713;">
    <field name="username" widget="text" key="username" attrs="" display="Username" id="uuid-5F012008-97D4-11F0-8457-3F3CDBBCD7F8" value=""/>
    <field key="password" id="uuid-5F016644-97D4-11F0-8457-3F3CDBBCD7F8" attrs="" display="Password" widget="password" name="password"/>
    <field widget="submit" key="submit" attrs="" value="" id="uuid-5F01B00E-97D4-11F0-8457-3F3CDBBCD7F8" display="Login" name="submit"/>
  </form>
</response>