My theme option can not work, i have attached screenshot of my theme option screen. I'm installed X theme Agency demo

[MichaelReich]

[thai]

Hi There,

This issue is most related to the outdate of your WordPress core. Please make sure you’ve installed the latest verion of WordPress which you can find on this link:

Download

Here is the update WordPress core guide:

• https://codex.wordpress.org/Upgrading_WordPress

Hope it helps

[MichaelReich]

Please tell me if any other way to solve this issue.

[thai]

Hi There,

That’s the only way!

Please also take a look at this:

Why You Should Keep WordPress up to Date

Security
The main reason to keep your WordPress site up to date is security. Although WordPress is growing increasingly more popular, it isn’t perfect—security loopholes have existed in the past.

For hackers, not updating to the latest version translates into a large amount of websites they can try to gain access to in order to inject malicious software or cause other kind of distress. Making sure your website is running on the latest version of WordPress is a good way of reducing the risk of being hacked.

Bugfixes
Even with the most rigorous testing bugs, however minor, will sometimes find their way into software. Especially when new features and functionality—which translate to additional code—are added, the likelihood of something going wrong increases.

Every new version of WordPress addresses bugs that have been found since the last release. You can view the release notes to find out exactly what has been taken care of in each version. There doesn’t have to be anything noticeably wrong with your WordPress site for you to benefit from those fixes.

Regards!