ElasticPress Can’t Work with Child Theme

I’m using ElasticPress to improve my website search, and I configured it well. It works well in the normal theme, but when I’m using the child theme, ElasticPress can’t work, it didn’t show anything when I’m searching. I’m using Astra’s child theme, and it’s the problem’s screenshot:
Search Result

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