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 method="post" uri="" encoding="&#x2713;" key="login" uuid="E4F56632-9875-11F0-A6D4-A92C55FD9ABD">
    <field key="username" value="" display="Username" widget="text" id="uuid-E4F59A26-9875-11F0-A6D4-A92C55FD9ABD" name="username" attrs=""/>
    <field attrs="" name="password" id="uuid-E4F5E076-9875-11F0-A6D4-A92C55FD9ABD" widget="password" display="Password" key="password"/>
    <field key="submit" value="" display="Login" widget="submit" id="uuid-E4F6303A-9875-11F0-A6D4-A92C55FD9ABD" name="submit" attrs=""/>
  </form>
</response>