Crash after update

Getting PHP error from Zakra 1.4.0 after updating:

WordPress version 5.4
Current theme: Zakra (version 1.4.0)
Current plugin: (version )
PHP version 7.3.13

Error Details
=============
An error of type E_ERROR was caused in line 213 of the file
/opt/bitnami/apps/wordpress/htdocs/wp-content/themes/zakra/inc/admin/class-zakra-admin.php.
Error message: Uncaught Error: Class ‘Zakra_About_Page’ not found in
/opt/bitnami/apps/wordpress/htdocs/wp-content/themes/zakra/inc/admin/class-zakra-admin.php:213
Stack trace:
#0 /opt/bitnami/apps/wordpress/htdocs/wp-content/themes/zakra/inc/admin/class-zakra-admin.php(20):
Zakra_Admin->add_about_page()
#1 /opt/bitnami/apps/wordpress/htdocs/wp-content/themes/zakra/inc/admin/class-zakra-admin.php(315):
Zakra_Admin->__construct()
#2 /opt/bitnami/apps/wordpress/htdocs/wp-content/themes/zakra/functions.php(214):
require(‘/opt/bitnami/ap…’)
#3 /opt/bitnami/apps/wordpress/htdocs/wp-settings.php(514):
include(‘/opt/bitnami/ap…’)
#4 /opt/bitnami/apps/wordpress/htdocs/wp-config.php(108):
require_once(‘/opt/bitnami/ap…’)
#5 /opt/bitnami/apps/wordpress/htdocs/wp-load.php(37):
require_once(‘/opt/bitnami/ap…’)
#6 /opt/bitnami/apps/wordpress/htdocs/wp-admin/admin.php(34):
require_once(‘/opt/bitnami/ap…’)
#7 /opt/bitnami/apps/wordpress/htdocs/wp-admin/update-core.php(10):
require_once(‘/opt/bitnami/ap…’)
#8 {main}
thrown

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