.htaccess error: Require not allowed here

Replies: 0

BackupWP version 3.3.7 causes this error message repeatedly in the Apache error logs (on Ubuntu 16.04.1):

<path...>/wordpress/wp-content/plugins/backwpup/.htaccess:
Require not allowed here, referer: https://mysite.com/wordpress/wp-admin/

The .htaccess file, which was generated by BackupWP, contains:

<Files *.php>
    <IfModule mod_authz_core.c>
        Require all denied
    </IfModule>
    <IfModule !mod_authz_core.c>
        Order allow,deny
        Deny from all
    </IfModule>
</Files>

Is this a BackupWP bug? What should be done? Thanks.