I installed the plugin but I encountered such difficulties
1 search engine has a field "Distance Radius km" which I can not remove
   http://prntscr.com/jjw37d
   https://batumi24.info/index.php?page=search&sCategory=4
2 that's so badly displayed checkbox and radio button when submitting an ad
   http://prntscr.com/jjw53j
3 I have three levels of categories. example real estate> apartments> sale, rent, daily rent...
having created additional fields I give value that were displayed in a category "apartments" that is also displayed in its subcategories
http://prntscr.com/jjwgv1
when submitting an advertisement real estate> apartments> selling _ additional fields are not displayed Only when the apartments are selected are displayed without subcategories

I am not sure if all your questions are related to attributes plugin.
1. Can be removed in radius search plugin settings
2. Based on your screenshot your site or browser blocks font-awesome styles
3. You must use different type to show categories in theme settings

I updated the browser and checked it on other browsers but still badly shows checkbox and Radio
I work in Google Chrome
Try you
https://batumi24.info/index.php?page=item&action=item_add

Your theme may be rewritting fonts of all elements. Please test it on bender theme.

Yes Bender works
how do I fix the problem on my template?

You should talk to your theme developer. Very common problem in theme if developer use * selector in css to setup same font. This will rewrite also font-awesome and cause such strange chars to be shown.

Thank you. I solved the problem developers of template have not answered for a long time to other questions. I like the template Stela. But there are moments that need to be worked out and add functionality

Get refund if developer does not answer.