SERVER ERROR 500

Hi @wiki2018.

I should say that the plugin has 70,000+ installs and it was never reported before. So it’s probably something else. Anyway, if other users start to report the same issue, it will have a bug fix for sure.

For now this should help you:
https://www.elegantthemes.com/blog/tips-tricks/how-to-fix-the-500-internal-server-error-on-your-wordpress-website

If doesn’t help, you can start sending me the debug.log