[23-Sep-2023 10:26:55 UTC] PHP Fatal error:  Uncaught Error: Failed opening required '/srv/htdocs/wp-content/plugins/custom-post-type-ui/inc/about.php' (include_path='/:.') in/srv/htdocs/wp-content/plugins/custom-post-type-ui/custom-post-type-ui.php:192
Stack trace:
#0 /wordpress/core/6.3.1/wp-includes/class-wp-hook.php(310): cptui_create_submenus('')
#1 /wordpress/core/6.3.1/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters('', Array)
#2 /wordpress/core/6.3.1/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#3 /srv/htdocs/wp-content/plugins/custom-post-type-ui/custom-post-type-ui.php(180): do_action('cptui_loaded')
#4 /wordpress/core/6.3.1/wp-includes/class-wp-hook.php(310): cptui_loaded('')
#5 /wordpress/core/6.3.1/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array)
#6 /wordpress/core/6.3.1/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#7 /wordpress/core/6.3.1/wp-settings.php(495): do_action('plugins_loaded')
#8 /srv/htdocs/wp-config.php(89): require_once('/wordpress/core...')
#9 /wordpress/core/6.3.1/wp-load.php(55): require_once('/srv/htdocs/wp-...')
#10 /wordpress/core/6.3.1/wp-blog-header.php(13): require_once('/wordpress/core...')
#11 /wordpress/core/6.3.1/index.php(17): require('/wordpress/core...')
#12 {main}
  thrown in /srv/htdocs/wp-content/plugins/custom-post-type-ui/custom-post-type-ui.php on line 192