My Problem When I Import Theme Settings

I use google translation. There may be incorrect language usage.

I have Newspaper theme installed. Licensed and up-to-date theme. It used to work without any problems, but after a while it started to cause problems in a way I couldn’t understand. When you enter the management panel of the theme and change any settings, the theme does not save this setting. The loading screen keeps spinning around but never ending.

I have deleted and reinstalled the theme and even wordpress many times, but the same error persists. Today, I noticed that when I import old theme settings, it starts giving such an error. So I’m installing the theme, restoring everything else (pages, plugins, etc.) no problem, but after restoring the theme’s settings from the theme’s settings panel, it creates this problem for me. It’s fine when I don’t restore the theme settings. I also need to install it because there are a lot of tweaks.

PHP version or limits all as they should be.

What could cause this problem?

Problem solved. Thank you so much.