We are adding test page to check the error , but we could’t get such error that you mention above. But sometime site seems like break down and need to be refresh again and running properly while adding or updating post. So we are checking our theme in local server and it work properly. It seems there is a plugin conflict in the site. Please check the site for plugin issue with following steps:
To test for a plugin conflict:
1. Deactivate ALL plugins
2. Activate your theme(if already activate then leave as it is)
3. Check to see if the issue occurs
If the issue does not occur, one (or more) of your plugins is causing a conflict with theme.
To determine which plugin(s) is causing the conflict, follow these steps:
1. Activate each plugin one by one
2. Check to see if the issue occurs after each plugin is activated
Please let us know, If you face error again.