Yes, exactly!
1) I clicked on “reset settings to wp” button in HMWP start tab and then deactivated HMWP plugin (also disabled minification for testing). But still the submit button leads to 404 page. So the issue doesn’t seem to be related to HMWP. Please try setting htaccess content to WP default (https://codex.wordpress.org/htaccess)
2) If you want to replace css class name/id like “rev_slider_wrapper”, then you have to follow these steps:
– in HMWP “replace in html” option add the following:
rev_slider_wrapper ==> my_slider
– now in rev slider plugin (css file) find word “rev_slider_wrapper” and replace with “my_slider”
8) without the login url how will one login to the site? Theme my login plugin can rename the login url but this will be shown too. You’ll need to remove login link from the site for this.