In latest conversations with Yana we have figured out that at this moment jreviews 2.3 and then especially the advanced search form is not working (see post: http://www.reviewsforjoomla.com/forum/i ... opic=22609)
After investigation from your side we found out that the issue was:
"Content type should be application/json. It is text/html."
I have been able to upgrade to jreviews 2.4, the latest release with (what the owners say) all code is written in JSON. Now the advanced search form is showing just fine although the field options are not translated:
Could you please take a look again?