Error encountered; please report this error to a wizard.

VerbLoc:Verb	Programmer	This	Player	Line
#52:description2html	#7407	#52	#6421	7
#1628:www_description	#833	#2955	#6421	4
#2:tell_www_body	#60	#2955	#6421	2
#5:tell_www_body	#60	#2955	#6421	1
#2:tell_www_page	#789	#2955	#6421	13
#2259:tell_www_page	#60	#2955	#6421	4
#80:serve_page	#789	#80	#6421	42
#81:do_GET	#55	#6421	#6421	12
#81:do_null_command	#55	#6421	#6421	9
#80:do_null_command	#789	#80	#6421	1

You can cut-and-paste the following:

#52:description2html (this == #52), line 7: Type mismatch
... called from #1628:www_description (this == #2955), line 4
... called from #2:tell_www_body (this == #2955), line 2
... called from #5:tell_www_body (this == #2955), line 1
... called from #2:tell_www_page (this == #2955), line 13
... called from #2259:tell_www_page (this == #2955), line 4
... called from #80:serve_page (this == #80), line 42
... called from #81:do_GET (this == #6421), line 12
... called from #81:do_null_command (this == #6421), line 9
... called from #80:do_null_command (this == #80), line 1
(end of traceback)