It has been brought to my attention that S&F wasn’t compatible with WP 4.2.
There are some changes to the way taxonomies and terms work, however I think most people will be unaffected.
There does appear to be another more unusual problem – the various field elements aren’t showing.
This is seeming very random, but it seems you can’t pass a “name” var to https://codex.wordpress.org/Template_Tags/wp_list_categories – which is used to display all the different fields relating to tags, categories and taxonomies.
I’ve just pushed a fix for this and it should be available in the usual way – via your account / the WordPress plugins page.
UPDATE: There appears to be some repercussions from this update as it was rushed out – my initial analysis of this is that it is related to certain field types, which ends up throwing a JS error – or a malformed search query – as far as I can tell so far – its multiselects that are causing issues – if you are having problems as a temporary workaround try changing the field of the field(s) that are not working correctly.
In addition to this tag, category and taxonomy inclusion/exclusion seems to have broken too.
UPDATE2 : Version 1.4.3 has been released which should solve the above problems.
Thanks