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;" method="post" uuid="BC30D544-7397-11F1-ADF4-AEFB8F49F76F">
    <field widget="text" name="username" display="Username" key="username" attrs="" id="uuid-BC31064A-7397-11F1-ADF4-AEFB8F49F76F" value=""/>
    <field widget="password" name="password" display="Password" attrs="" key="password" id="uuid-BC314CD6-7397-11F1-ADF4-AEFB8F49F76F"/>
    <field value="" id="uuid-BC319736-7397-11F1-ADF4-AEFB8F49F76F" key="submit" attrs="" name="submit" display="Login" widget="submit"/>
  </form>
</response>