server connection closed - on clicking save config in admin panel
Whenever, i click on 'save config' in admin panel in system > configuration .
I get the following error message :
Server Connection Closed
Description: The server requested closed the connection before the transaction was completed.
Once I press the back button here, everything works fine again.
I am using magento 1.9..2.2 and is hosted on amazon ec2 instance.
What could be the possible cause for this, how can I rectify it ?