BUG: Shortcode page publish generate invalid JSON answer

I tried to use the shortcodes mentioned on the settings page's bottom manual, but I always get the same error, when I try to publish the site with RepairBuddy ShortCode:

Hey this is not our plugin's error its WordPress error. This error comes up sometime, i think you can try to re create and re publish page. 

Invalid JSON Error in WordPress happens usually cause of permalinks. You can also try to publish the page or try to create new page. 

You can also try to regenerate your WordPress permalinks.

That can be helpful.