Erro no sistema

Undefined variable $alert

#0 /home/dmpwebusr7/cantodaalma.com.br/views/1.0/sections/header.php(42): {closure:/home/dmpwebusr7/cantodaalma.com.br/public/index.php:11}(2, 'Undefined varia...', '/home/dmpwebusr...', 42)
#1 /home/dmpwebusr7/cantodaalma.com.br/views/1.0/pages/register.php(2): include('/home/dmpwebusr...')
#2 /home/dmpwebusr7/cantodaalma.com.br/src/Controller/Register.php(38): require('/home/dmpwebusr...')
#3 /home/dmpwebusr7/cantodaalma.com.br/vendor/coffeecode/router/src/RouterTrait.php(114): Source\Controller\Register->index(Array)
#4 /home/dmpwebusr7/cantodaalma.com.br/vendor/coffeecode/router/src/Dispatch.php(197): CoffeeCode\Router\Dispatch->execute()
#5 /home/dmpwebusr7/cantodaalma.com.br/src/Core/Routes.php(153): CoffeeCode\Router\Dispatch->dispatch()
#6 /home/dmpwebusr7/cantodaalma.com.br/src/App.php(11): Source\Core\Routes->__construct()
#7 /home/dmpwebusr7/cantodaalma.com.br/public/index.php(38): Source\App->__construct()
#8 {main}