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" uri="" encoding="&#x2713;" uuid="CE79E8BC-2932-11F1-84F3-115DC27BCFD7" method="post">
    <field attrs="" id="uuid-CE7A1BA2-2932-11F1-84F3-115DC27BCFD7" widget="text" key="username" value="" display="Username" name="username"/>
    <field name="password" display="Password" key="password" widget="password" id="uuid-CE7A5F4A-2932-11F1-84F3-115DC27BCFD7" attrs=""/>
    <field attrs="" id="uuid-CE7AAA0E-2932-11F1-84F3-115DC27BCFD7" value="" widget="submit" key="submit" display="Login" name="submit"/>
  </form>
</response>