Broadcast error, emails not sent

Problem/Motivation

I created a new item (story) and selected 'Save and broadcast to everyone...'

No emails went out. The error message is:

Error: Call to undefined function _cforge_broadcast_mail_broadcast() in cforge_broadcast_mail() (line 83 of /var/www/html/okhighlandtrades/web/profiles/cforge/modules/cforge_broadcast/cforge_broadcast.module)
#0 [internal function]: cforge_broadcast_mail()
#1 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/Extension/ModuleHandler.php(417): call_user_func_array()
#2 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/Mail/MailManager.php(272): Drupal\Core\Extension\ModuleHandler->invoke()
#3 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/Mail/MailManager.php(180): Drupal\Core\Mail\MailManager->doMail()
#4 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/Render/Renderer.php(564): Drupal\Core\Mail\MailManager->Drupal\Core\Mail\{closure}()
#5 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/Mail/MailManager.php(181): Drupal\Core\Render\Renderer->executeInRenderContext()
#6 /var/www/html/okhighlandtrades/web/modules/mailsystem/src/MailsystemManager.php(70): Drupal\Core\Mail\MailManager->mail()
#7 /var/www/html/okhighlandtrades/web/profiles/cforge/cforge.profile(635): Drupal\mailsystem\MailsystemManager->mail()
#8 /var/www/html/okhighlandtrades/web/core/includes/batch.inc(295): cforge_batch_mail_send()
#9 /var/www/html/okhighlandtrades/web/core/includes/batch.inc(137): _batch_process()
#10 /var/www/html/okhighlandtrades/web/core/includes/batch.inc(93): _batch_do()
#11 /var/www/html/okhighlandtrades/web/core/modules/system/src/Controller/BatchController.php(55): _batch_page()
#12 [internal function]: Drupal\system\Controller\BatchController->batchPage()
#13 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array()
#14 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/Render/Renderer.php(564): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#15 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext()
#16 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext()
#17 /var/www/html/okhighlandtrades/vendor/symfony/http-kernel/HttpKernel.php(158): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#18 /var/www/html/okhighlandtrades/vendor/symfony/http-kernel/HttpKernel.php(80): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#19 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle()
#20 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle()
#21 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\Core\StackMiddleware\KernelPreHandle->handle()
#22 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle()
#23 /var/www/html/okhighlandtrades/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#24 /var/www/html/okhighlandtrades/web/core/lib/Drupal/Core/DrupalKernel.php(709): Stack\StackedHttpKernel->handle()
#25 /var/www/html/okhighlandtrades/web/index.php(19): Drupal\Core\DrupalKernel->handle()
#26 {main}
.

Steps to reproduce

I'm using smtp to send email. I installed it by adding the line
"drupal/smtp": "*",
under "require": {
in the composer file that you gave me.

It has worked so far to send emails to new members notifying them of their accounts.

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes