.htaccess Mod Rewrite Rules only checks one of the files that needs updating

It appears that the plugin wants two .htaccess files to be updated:

1) /home/mysite/public_html/.htaccess
2) /home/mysite/public_html/wp-content/cache/.htaccess too:

However, if I manually update only the first one, no further error message is displayed.

I think checks should be made to both locations.