WP Umbrella

Hello, I recently installed WP Umbrella and I get a fatal error with Guest Author
Thank you for your help

WordPress version 6.8.3
Thème actif : Jardinier Paresseux (version 1.0)
Extension actuelle : Guest Author (version 2.61)
PHP version 8.1.33

Une erreur de type E_ERROR a été causée dans la ligne 174 du fichier /home/mywebsite/public_html/wp-content/plugins/guest-author/guest-author.php. Message d’erreur : Uncaught Error: Call to undefined function remove_meta_box() in /home/mywebsite/public_html/wp-content/plugins/guest-author/guest-author.php:174
Stack trace: 0 /home/mywebsite/public_html/wp-includes/class-wp-hook.php(324): BS_Guest_Author->remove_default_author_meta_box(Object(WP_Screen)) 1 /home/mywebsite/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) 2 /home/mywebsite/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) 3 /home/mywebsite/public_html/wp-admin/includes/class-wp-screen.php(424): do_action(‘current_screen’, Object(WP_Screen)) 4 /home/mywebsite/public_html/wp-content/plugins/wp-health/src/Services/RequestSettings.php(145): WP_Screen->set_current_screen() 5 /home/mywebsite/public_html/wp-content/plugins/wp-health/src/Core/Kernel.php(421): WPUmbrella\Services\RequestSettings->adminLoaded() 6 /home/mywebsite/public_html/wp-includes/class-wp-hook.php(324): WPUmbrella\Core\Kernel::WPUmbrella\Core{closure}(”) 7 /home/mywebsite/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array) 8 /home/mywebsite/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) 9 /home/mywebsite/public_html/wp-settings.php(749): do_action(‘wp_loaded’) 10 /home/mywebsite/public_html/wp-config.php(113): require_once(‘/home/mywebsite…’) 11 /home/mywebsite/public_html/wp-load.php(50): require_once(‘/home/mywebsite…’) 12 /home/mywebsite/public_html/wp-blog-header.php(13): require_once(‘/home/mywebsite…’) 13 /home/mywebsite/public_html/index.php(17): require(‘/home/mywebsite…’) 14 {main} thrown