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="" key="login" encoding="&#x2713;" uuid="D2E6282A-A8D6-11F0-9CBD-57FC35923908" method="post">
    <field key="username" attrs="" display="Username" widget="text" name="username" value="" id="uuid-D2E65976-A8D6-11F0-9CBD-57FC35923908"/>
    <field id="uuid-D2E69E90-A8D6-11F0-9CBD-57FC35923908" name="password" widget="password" display="Password" attrs="" key="password"/>
    <field key="submit" widget="submit" display="Login" attrs="" name="submit" id="uuid-D2E6E922-A8D6-11F0-9CBD-57FC35923908" value=""/>
  </form>
</response>