PHP Warning error

Hello,

after the last update I have this php error warning.

I hope it can help for next updates.
Cristina

Message: Undefined variable: default

Location:

wp-content/plugins/tutor/includes/tutor-general-functions.php:710
tutor_js_date_format_against_wp()
wp-content/plugins/tutor/classes/Assets.php:44
TUTOR\Assets->get_default_localized_data()
wp-content/plugins/tutor/classes/Assets.php:68
TUTOR\Assets->admin_scripts()
wp-includes/class-wp-hook.php:303
do_action(‘admin_enqueue_scripts’)
wp-admin/admin-header.php:102