Hello, i have same problem.
There is stacktrace:
Fatal error: Uncaught ArgumentCountError: Too few arguments to function WPMenuEditor::maybe_reset_plugin_access(), 1 passed in /var/www/affgambler/data/www/affgambler.ru/wp-includes/class-wp-hook.php on line 286 and exactly 2 expected in /var/www/affgambler/data/www/affgambler.ru/wp-content/plugins/admin-menu-editor-pro/includes/menu-editor-core.php:1096 Stack trace: #0 /var/www/affgambler/data/www/affgambler.ru/wp-includes/class-wp-hook.php(286): WPMenuEditor->maybe_reset_plugin_access('affgambler') #1 /var/www/affgambler/data/www/affgambler.ru/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array) #2 /var/www/affgambler/data/www/affgambler.ru/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /var/www/affgambler/data/www/affgambler.ru/wp-content/themes/sportsnews/ajax/login.php(29): do_action('wp_login', 'affgambler') #4 {main} thrown in /var/www/affgambler/data/www/affgambler.ru/wp-content/plugins/admin-menu-editor-pro/includes/menu-editor-core.php on line 1096
I fixed this in menu-editor-core.php on line 1096 adding default value to $current_user = false
