PHP Error with Renamed Login Pages

The Minimer theme is throwing an error when used in conjunction with a plugin that renames the login page (common for most security plugins). This began with the most recent update to the Minimer theme (release 1.2.9)

Error Details
=============
An error of type E_ERROR was caused in line 51 of the file /var/www/html/path/wp-content/themes/minimer/header.php. Error message: Uncaught Error: Class "Minimer\Nav" not found in /var/www/html/path/wp-content/themes/minimer/header.php:51
Stack trace:
#0 /var/www/html/path/wp-includes/template.php(730): require_once()
#1 /var/www/html/path/wp-includes/template.php(676): load_template()
#2 /var/www/html/path/wp-includes/general-template.php(48): locate_template()
#3 /var/www/html/path/wp-content/themes/minimer/page.php(1): get_header()
#4 /var/www/html/path/wp-content/plugins/all-in-one-wp-security-and-firewall/classes/wp-security-process-renamed-login-page.php(247): include('...')
#5 /var/www/html/path/wp-content/plugins/all-in-one-wp-security-and-firewall/classes/wp-security-process-renamed-login-page.php(165): AIOWPSecurity_Process_Renamed_Login_Page::aiowps_set_404()
#6 /var/www/html/path/wp-content/plugins/all-in-one-wp-security-and-firewall/classes/wp-security-wp-loaded-tasks.php(20): AIOWPSecurity_Process_Renamed_Login_Page::renamed_login_init_tasks()
#7 /var/www/html/path/wp-content/plugins/all-in-one-wp-security-and-firewall/wp-security-core.php(202): AIOWPSecurity_WP_Loaded_Tasks->__construct()
#8 /var/www/html/path/wp-includes/class-wp-hook.php(292): AIO_WP_Security->aiowps_wp_loaded_handler()
#9 /var/www/html/path/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()
#10 /var/www/html/path/wp-includes/plugin.php(484): WP_Hook->do_action()
#11 /var/www/html/path/wp-settings.php(582): do_action()
#12 /var/www/html/path/wp-config.php(98): require_once('...')
#13 /var/www/html/path/wp-load.php(37): require_once('...')
#14 /var/www/html/path/wp-login.php(12): require('...')
#15 {main}
 thrown