I have renamed my folder 'wp-content' to another name, but this plugin does not handle the fact that this folder has been renamed. MAybe it does but the error display is than wrong.
Instead of hardcoding 'wp-content' folder name, please use variable like WP_CONTENT_DIR.
Output of my security check:
Files & folders permission check Insufficient rights on wp-content folder! Insufficient rights on wp-content/themes folder! Insufficient rights on wp-content/plugins folder!