YITHCompare And WP Fastest Cache

Hi,
i use YITH WoCommerce Compare. But I get an error (AjaxURL has NOT been defined.) when I compare or press the compare button. How can i solve this problem ? I realized this wasn’t happening when I closed the WP Fastest Cache Options. If I turn off this plugin the problem goes away. I contacted the theme company. However, I have been told that I have to contact you. Here are my marks on the program ( please look at the image).
https://i.imgyukle.com/2020/08/13/urZASt.png

My web site is https://www.kilitpazar.com/

Thanks in advance for your interest.
Best regards.