Error encountered; please report this error to a wizard.

Error was: E_TYPE (Type mismatch); value: 0

VerbLoc:VerbProgrammerThisPlayerLine
#0:do_bf_call #60#0#77085
#104:bf_toobj #55#0#77082
#101:bf_toobj #60#0#770810
#47:www_read #61#47#770822
#46:tell_www_body #61#1681#770815
#2:tell_www_page #789#1681#770813
#80:serve_page #789#80#770842
#81:do_GET #55#7708#770812
#81:do_null_command #55#7708#77089
#80:do_null_command #789#80#77081

You can cut-and-paste the following:

#0:do_bf_call (this == #0), line 5: Type mismatch
... called from #104:bf_toobj (this == #0), line 2
... called from #101:bf_toobj (this == #0), line 10
... called from #47:www_read (this == #47), line 22
... called from #46:tell_www_body (this == #1681), line 15
... called from #2:tell_www_page (this == #1681), line 13
... called from #80:serve_page (this == #80), line 42
... called from #81:do_GET (this == #7708), line 12
... called from #81:do_null_command (this == #7708), line 9
... called from #80:do_null_command (this == #80), line 1
(end of traceback)