I recompiled and installed pillow for SWI-prolog on a Linux machine. When I try to consult html_forms.pl I get the following error:

?- consult('html_forms.pl').
% html.pl compiled 0.05 sec, 71,828 bytes
ERROR: (/home/httpd/cgi-bin/html_forms.pl:91):
Undefined procedure: save/2
Warning: (/home/httpd/cgi-bin/html_forms.pl:91):
Goal (directive) failed: user:save_cgi('html_forms.pl', main)
% html_forms.pl compiled 0.05 sec, 78,700 bytes