JS Error on clicking the filter items

Hello,

In the following link, we got an error that ajax doesn’t work on category items: https://ibb.co/qd42y16

Can anybody help us understand how we can fix it?

Uncaught TypeError: Cannot read properties of undefined (reading 'split')

https://mahdinaeeni.com/%d9%88%da%a9%db%8c%d9%84-%d8%af%d8%a7%d8%af%da%af%d8%b3%d8%aa%d8%b1%db%8c-%d8%af%d8%b1-%d8%aa%d9%87%d8%b1%d8%a7%d9%86/

Deactivating plugins doesn’t help us.
We also tried changing the strings to English, but unfortunately, it didn’t solve the issue.
Here are more details that I hope help: https://pastebin.com/uCzgsjbr.

Thank you in advance for your help.