‎(unknown)‎ ‎(unknown)‎ Hourglass Chart

ERROR 8: Trying to access array offset on value of type null
0 Error occurred on line 1649 of file class_person.php in function _addName
1 called from line 473 of file class_gedcomrecord.php in function _getAllNames
2 called from line 1834 of file class_person.php in function getAllNames
3 called from line 605 of file class_gedcomrecord.php in function getFullName
4 called from line 127 of file hourglass_ctrl.php in function init
5 called from line 36 of file hourglass.php

ERROR 2: Cannot modify header information - headers already sent by (output started at /usr/local/www/spyou/genealogie.spyou.org/web/includes/functions/functions.php:500)

Warning: Cannot modify header information - headers already sent by (output started at /usr/local/www/spyou/genealogie.spyou.org/web/includes/functions/functions.php:500) in /usr/local/www/spyou/genealogie.spyou.org/web/includes/functions/functions_print.php on line 471
‎(unknown)‎ ‎(unknown)‎ Hourglass Chart - PhpGedView