WordPress Auto Detected Issue with Course Builder

Hi,

Not sure how to let you know of this issue, but I received this automatic WordPress email a few days ago. However, I was not experiencing any login issues nor did I perform any updates.

From: The Drone Coach <[email protected]>
Sent: Sunday, May 29, 2022 5:59 AM
To: [email protected]
Subject: [TheDroneCoach.io] Your Site is Experiencing a Technical Issue

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 your theme, Course Builder.`

First, visit your website (https://thedronecoach.io/) and check for any visible issues. Next, visit the page where the error was caught (https://thedronecoach.io/wp-login.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.

[Link Removed]

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.0
Active theme: Course Builder Child (version 1.0.0) Current plugin: (version ) PHP version 8.0.15

Error Details
=============
An error of type E_ERROR was caused in line 2214 of the file /home/325226.cloudwaysapps.com/rprbgthnje/public_html/wp-content/themes/course-builder/inc/custom-functions.php. Error message: Uncaught Error: Call to a member function get_error_code() on null in /home/325226.cloudwaysapps.com/rprbgthnje/public_html/wp-content/themes/course-builder/inc/custom-functions.php:2214
Stack trace:
#0 /home/325226.cloudwaysapps.com/rprbgthnje/public_html/wp-includes/class-wp-hook.php(307): thim_register_failed()
#1 /home/325226.cloudwaysapps.com/rprbgthnje/public_html/wp-includes/plugin.php(191): WP_Hook->apply_filters()
#2 /home/325226.cloudwaysapps.com/rprbgthnje/public_html/wp-includes/user.php(3362): apply_filters()
#3 /home/325226.cloudwaysapps.com/rprbgthnje/public_html/wp-login.php(1047): register_new_user()
#4 {main}
thrown`

The page I need help with: [log in to see the link]