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Which plugin is the one with the problem?

I cannot find out what plugin cause the problem. Because I try de activate and re activate all plugin but nothing effect. I think the problem is from wordpress core. But any other solution ?

Ok, sorry I misunderstood.

Try switching to the Twenty Sixteen theme to rule-out a theme-specific issue (theme functions can interfere like plugins).

If that made no difference, try downloading WordPress again, access your server via SFTP or FTP, or a file manager in your hosting account’s control panel, and delete then replace your copies of everything on the server except the wp-config.php file and the /wp-content/ directory with fresh copies from the download. This will effectively replace all of your core files without damaging your content and settings.

Some uploaders tend to be unreliable when overwriting files, so don’t forget to delete the original files before replacing them.

I have the same problem and discovered is the child theme issue. Disable child theme if exist and try to create new child theme. I create child theme with One Click Child Theme plugin.