I have created an activity in the site, when it is in the draft once perview it shows the post. But when publish the post, it gives 404 error
Please go to Settings > Permalinks > select Post Name type then check your activity again.
if it still does not work, please provide an admin account so i can help you check it.
We are using ticksy.com support server long time ago but its looks like not work good last time caused we will move to our server for support to clients better.
We will switch to new support system to http://shinehelp.shinetheme.com from today August 14, 2017 and with all old tickets on https://shinehelp.ticksy.com will continue get support untill August 31. 2017.
From now for all new tickets you can post on our new support system http://shinehelp.shinetheme.com