PHP Warning wtih WP 5.8 widgets page

Hi, I just noticed a PHP warning on the new Widgets page in WordPress 5.8.
The warning I see is:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘duplicator_global_scripts’ not found or invalid function name in …\wo-includes/class-wp-hook.php on line 303

Here’s some of my system information, I ran into the warning on my localhost with debugging enabled.

### wp-core ###

version: 5.8
site_language: en_US
user_language: en_US
timezone: America/New_York
permalink: /%postname%/
https_status: true
multisite: false
user_registration: 0
blog_public: 1
default_comment_status: closed
environment_type: production
user_count: 2
dotorg_communication: true

### wp-server ###

server_architecture: Windows NT 10.0 AMD64
httpd_software: Apache/2.4.35 (Win64) OpenSSL/1.1.1e PHP/7.4.5
php_version: 7.4.5 64bit
php_sapi: apache2handler
max_input_variables: 1000
time_limit: 36000
memory_limit: 512M
max_input_time: 60
upload_max_filesize: 2G
php_post_max_size: 2G
curl_version: 7.69.1 OpenSSL/1.1.1e
suhosin: false
imagick_availability: false
pretty_permalinks: true
htaccess_extra_rules: true

### wp-plugins-active (7) ###

Duplicator: version: 1.4.1, author: Snap Creek (latest version: 1.4.2), Auto-updates disabled
Gravity Forms: version: 2.5.7, author: Gravity Forms, Auto-updates disabled
Imagify: version: 1.9.14, author: WP Media (latest version: 1.10), Auto-updates disabled
SEOPress: version: 4.7.0.1, author: SEOPress (latest version: 4.7.0.2), Auto-updates disabled
SEOPress PRO: version: 3.8.9, author: SEOPress (latest version: 4.7), Auto-updates disabled
Simply Static: version: 2.1.4.2, author: Patrick Posner, Auto-updates disabled
WP Rocket: version: 3.9.0.4, author: WP Media (latest version: 3.9.1), Auto-updates disabled