Hi, please follow these steps:
– goto HMWP Start Tab, select “Medium Privacy – More Compatibility” scheme and save the settings
– goto Permalink & URLs tab and set “rename plugins” option to “all plugins”
– goto General settings tab and uncheck/disable “Directory List” option
Note: Assuming that it’s WP single site and Apache server. Your site’s htaccess file should be writeable.
If it’s still the issue, then please let us know your website’s wp-admin login details (as private reply), so that we can have a look at the issue.