Error: In my courses page the filter is not working

There is some error on my courses page. On my website, I have translated it into two languages English and Khmer language and I use Translatepress to translate it. When the website is in English language the filter on the courses page works normally but when I switch to Khmer language it does not work. Please help me how can I fix it? Thank you.

The page I need help with: [log in to see the link]