Notification error when registering new user trigger

Hello,

After I have updated the plugin I get this error when creating a new user and notification tries to send a notification out to me.

Howdy!

Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, Notification.

First, visit your website (https://startupweb.me/) and check for any visible issues. Next, visit the page where the error was caught (https://startupweb.me/wp-admin/user-new.php) and check for any visible issues.

Please contact your host for assistance with investigating this issue further.

If your site appears broken and you can’t access your dashboard normally, WordPress now has a special “recovery mode”. This lets you safely login to your dashboard and investigate further.

https://startupweb.me/wp-login.php?action=enter_recovery_mode&rm_token=K0yykJBNz0pQsftd6uPMwA&rm_key=o9713XobjYSNkl6jhVxUfu

To keep your site safe, this link will expire in 1 day. Don’t worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

Error Details
=============
An error of type E_ERROR was caused in line 31 of the file /home/startu48/startupweb.me/wp-content/plugins/notification/class/Integration/Gutenberg.php. Error message: Uncaught Error: Call to undefined method BracketSpace\Notification\Defaults\Trigger\User\UserRegistered::get_post_type() in /home/startu48/startupweb.me/wp-content/plugins/notification/class/Integration/Gutenberg.php:31
Stack trace:
#0 /home/startu48/startupweb.me/wp-includes/class-wp-hook.php(286): BracketSpace\Notification\Integration\Gutenberg->maybe_postpone_action(Object(BracketSpace\Notification\Defaults\Trigger\User\UserRegistered))
#1 /home/startu48/startupweb.me/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(”, Array)
#2 /home/startu48/startupweb.me/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /home/startu48/startupweb.me/wp-content/plugins/notification/class/Abstracts/Trigger.php(521): do_action(‘notification/tr…’, Object(BracketSpace\Notification\Defaults\Trigger\User\UserRegistered))
#4 /home/startu48/startupweb.me/wp-content/plugins/notification/class/Abstracts/Trigger.php(479): BracketSpace\Notification\Abstracts\Trigger->_after_action(NULL)
#5 /home/startu48/startupw