404 Errors

I used the plugin to move my client’s site from my localhost to the web server and after the move I am getting 404 errors whenever I try to save/publish/update any page or post. I am just redirected to a 404 page when I click the update button.

The problem didn’t exist before the move and I have tried everything to fix it. Disable all plugins, Change to default theme, etc.. But, nothing has helped. What should I do now?

https://ww.wp.xz.cn/plugins/wp-clone-by-wp-academy/