when you update your site, then your server may be experiencing down as seen in this message:

Network Error (tcp_error)
A communication error occurred: "Operation timed out"
The Web Server may be down, too busy, .... so on ...

each time you click update it always happens as above
But you do not have to worry about ......

AT THAT TIME, oxwall system will automatically change your site into maintanance ....

try to open your page URL:  yoursite. com /ow_updates...

You will see

Update complated
Your version is...
Go to Index page or Admin Panel (Just Clicking to solve problem)

or

update Request or
Your version is up to date.
Go to Index Page ...

Thats is my site experiences....
google translated