Which version of the plugin do you have installed? Is it 2.3.0? If not, please update that.
Note that this latest version of S&F Pro now supports relationship fields in ACF and ACF Pro (so where you might before have had to use the ID number of an option, you can now use its actual value). In your case, for example.
You have a meta key called workshop_location
where ID 350 is actually Central Asia & The Caucasus
, but I see the query in the url shows this still as:
?_sfm_workshop_location=313
I do not think that this is the issue, but worth checking.
The other thing I note is that the results container looks wrong. It is set to #main
and I think it should be .content