I installed wp-h5bp-htaccess plugin in my wordpress and activated it. But my .htacces kept the same. This plugin don’t include html5 .htaccess lines on it?
Are you seeing an error about it not being writable? That’s the obvious thing to check first.
I’m testing on localhost, whit WP_DEBUG set true. But can’t see no error.
I’m having the same problem on a live server.
No error about htaccess not being writeable.
I tried removing the existing htaccess and deactivated/activated the wp-h5bp-htaccess plugin several times.
No new htaccess created and no edits made to an existing htaccess.