[تم الحل] Arabic pages are given an error

Background of the issue:
I need help with my website الرابط المخفي. After translating all my websites using WPML, I tested them, but the Arabic pages were not working. I also need help changing some page names in Arabic for the main menu.

Symptoms:
Arabic pages are not working after translation.

Questions:
How can I fix the issue with the Arabic pages not working?
How can I change some page names in Arabic for the main menu?