Error messageWarning: call_user_func_array() expects parameter 1 to be a valid callback, function 'mail_login_extra_validate' not found or invalid function name in Drupal\Core\Form\FormValidator->executeValidateHandlers() (line 82 of core/lib/Drupal/Core/

I just ran an update (composer require drupal/mail_login) and now whenever I log in with either username or email, I see the following warning. Can you help me determine what's happening?

Error message Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'mail_login_extra_validate' not found or invalid function name in Drupal\Core\Form\FormValidator->executeValidateHandlers() (line 82 of core/lib/Drupal/Core/Form/FormValidator.php).

Log shows:
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'mail_login_extra_validate' not found or invalid function name in Drupal\Core\Form\FormValidator->executeValidateHandlers() (line 82 of /home/navsmili/public_html/core/lib/Drupal/Core/Form/FormValidator.php)
#0 /home/navsmili/public_html/core/includes/bootstrap.inc(600): _drupal_error_handler_real(2, 'call_user_func_...', '/home/navsmili/...', 82, Array)
#1 [internal function]: _drupal_error_handler(2, 'call_user_func_...', '/home/navsmili/...', 82, Array)
#2 /home/navsmili/public_html/core/lib/Drupal/Core/Form/FormValidator.php(82): call_user_func_array('mail_login_extr...', Array)
#3 /home/navsmili/public_html/core/lib/Drupal/Core/Form/FormValidator.php(273): Drupal\Core\Form\FormValidator->executeValidateHandlers(Array, Object(Drupal\Core\Form\FormState))
#4 /home/navsmili/public_html/core/lib/Drupal/Core/Form/FormValidator.php(118): Drupal\Core\Form\FormValidator->doValidateForm(Array, Object(Drupal\Core\Form\FormState), 'user_login_form')
#5 /home/navsmili/public_html/core/lib/Drupal/Core/Form/FormBuilder.php(589): Drupal\Core\Form\FormValidator->validateForm('user_login_form', Array, Object(Drupal\Core\Form\FormState))
#6 /home/navsmili/public_html/core/lib/Drupal/Core/Form/FormBuilder.php(321): Drupal\Core\Form\FormBuilder->processForm('user_login_form', Array, Object(Drupal\Core\Form\FormState))
#7 /home/navsmili/public_html/core/lib/Drupal/Core/Controller/FormController.php(91): Drupal\Core\Form\FormBuilder->buildForm(Object(Drupal\user\Form\UserLoginForm), Object(Drupal\Core\Form\FormState))
#8 [internal function]: Drupal\Core\Controller\FormController->getContentResult(Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\RouteMatch))
#9 /home/navsmili/public_html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array)
#10 /home/navsmili/public_html/core/lib/Drupal/Core/Render/Renderer.php(573): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#11 /home/navsmili/public_html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))
#12 /home/navsmili/public_html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array)
#13 /home/navsmili/vendor/symfony/http-kernel/HttpKernel.php(151): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#14 /home/navsmili/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)
#15 /home/navsmili/public_html/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#16 /home/navsmili/public_html/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#17 /home/navsmili/public_html/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#18 /home/navsmili/public_html/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#19 /home/navsmili/public_html/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#20 /home/navsmili/public_html/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(52): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#21 /home/navsmili/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#22 /home/navsmili/public_html/core/lib/Drupal/Core/DrupalKernel.php(708): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#23 /home/navsmili/public_html/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#24 {main}
.