A PHP error was encountered

Message:

Undefined index: data_birthday

Location:

/home/italiand/public_html/application/views/users/elements/picture.php on line 21

Trace:

#1 /home/italiand/public_html/application/views/users/elements/picture.php(21): {closure}(8, 'Undefined index...', '/home/italiand/...', 21, Array)
#2 /home/italiand/public_html/system/core/codebreeder/view.php(171): include('/home/italiand/...')
#3 /home/italiand/public_html/application/core/view.php(659): CodeBreeder_View::load('users/elements/...', Array, false, 'users/elements/...')
#4 /home/italiand/public_html/application/views/users/timeline/picture.php(4): View::load('users/elements/...', Array)
#5 /home/italiand/public_html/system/core/codebreeder/view.php(171): include('/home/italiand/...')
#6 /home/italiand/public_html/application/core/view.php(655): CodeBreeder_View::load('users/timeline/...', Array, true, 'users/timeline/...')
#7 /home/italiand/public_html/application/hooks/users/users.php(202): View::load('users/timeline/...', Array, true)
#8 /home/italiand/public_html/system/core/codebreeder/hook.php(89): Users_Users_Hook->timelineViewUserPictureNew(Array, Array)
#9 /home/italiand/public_html/application/models/timeline/timeline.php(503): CodeBreeder_Hook::filter('timeline/view/u...', Array, Array)
#10 /home/italiand/public_html/application/helpers/timeline/timeline.php(97): Timeline_Timeline_Model->getActions('6043', true, 0, '15')
#11 /home/italiand/public_html/application/controllers/users.php(85): Timeline_Helper::getTimeline(Array, 1)
#12 /home/italiand/public_html/system/core/codebreeder/codebreeder.php(194): Users_Controller->view()
#13 /home/italiand/public_html/system/core/codebreeder/codebreeder.php(85): CodeBreeder_Core::execute()
#14 /home/italiand/public_html/index.php(99): CodeBreeder_Core::initialize(Array)
#15 {main}