#22 Menu returns blank page

[sutripa]

I changed line 317 in XHTML.pm from

if (@{$entries[0]} > 2) {

to
if (ref($entries[0][1]) eq "ARRAY") { # entries are groups...
--

However my menu page is still blank. My error_log says:

Use of uninitialized value $app_url in join or string at /usr/local/share/perl5/EMBOSS/GUI/XHTML.pm line 679., referer: http://www.mysite/cgi-bin/emboss

Is there a fix available for this?