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="" encoding="&#x2713;" method="post" uuid="D7B2B0D2-43A2-11F1-9CC4-D58B0C0019C7" key="login">
    <field display="Username" name="username" key="username" attrs="" id="uuid-D7B2E1D8-43A2-11F1-9CC4-D58B0C0019C7" value="" widget="text"/>
    <field key="password" display="Password" name="password" widget="password" attrs="" id="uuid-D7B32B52-43A2-11F1-9CC4-D58B0C0019C7"/>
    <field key="submit" display="Login" name="submit" widget="submit" attrs="" id="uuid-D7B37486-43A2-11F1-9CC4-D58B0C0019C7" value=""/>
  </form>
</response>