Thank you for enabling the debug, I can already see the problem. I'm getting this error:
Call to undefined function mb_strtolower() in ….
This means, that multibyte string functions are disabled on your server. I can suggest 2 possible solution to this issue:
1. Enabling multibyte string (mbstring) module – It's widely used, many plugins are using these functions, and are very helpful. Especially in your case – whereas your language does indeed use multibyte strings. Here are some guides how you can enable mbstring in your php.ini file:
If you don't know how to make these changes, please contact your server administrator.
2. Turning off the Display the description context? option on the Layout Options -> Results layout panel: https://i.imgur.com/HMNgVG1.png
This way you bypass the code conducting the error.
Let me know if any of this helped.Best,
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