A PHP error was encountered

Message:

Undefined index: value_

Location:

/home/datingvn/ahenho.com/application/libraries/bootstrap.php on line 228

Trace:

#1 /home/datingvn/ahenho.com/application/libraries/bootstrap.php(228): {closure}(8, 'Undefined index...', '/home/datingvn/...', 228, Array)
#2 /home/datingvn/ahenho.com/application/libraries/bootstrap.php(80): Bootstrap->getMultilangSettings()
#3 /home/datingvn/ahenho.com/application/models/users/session.php(306): Bootstrap->update()
#4 /home/datingvn/ahenho.com/application/models/users/session.php(76): Users_Session_Model->createGuestSession()
#5 /home/datingvn/ahenho.com/application/models/users/users.php(7): Users_Session_Model->__construct()
#6 /home/datingvn/ahenho.com/system/core/codebreeder/loader.php(367): Users_Users_Model->__construct(Array)
#7 /home/datingvn/ahenho.com/system/core/codebreeder/loader.php(212): CodeBreeder_Loader::instantiate('users_users_mod...', '_model', Array)
#8 /home/datingvn/ahenho.com/system/core/codebreeder/codebreeder.php(280): CodeBreeder_Loader::model('users/users', Array, true)
#9 /home/datingvn/ahenho.com/system/core/codebreeder/codebreeder.php(166): CodeBreeder_Core::loadClasses()
#10 /home/datingvn/ahenho.com/system/core/codebreeder/codebreeder.php(85): CodeBreeder_Core::execute()
#11 /home/datingvn/ahenho.com/index.php(100): CodeBreeder_Core::initialize(Array)
#12 {main}