This error came when i tried to access General Settings and other settings in the central administration. I used following code in the Power shell and get it worked. $w = get-spwebapplication http://webapplication $w.HttpThrottleSettings $w.Update()
(How to give permission to the BDC (Business Data Connectivity) Services) This message occurs when the user doesn't have the sufficient permission for the BDC services. First Check the BDC services are running. Then go to Manage in the ribbon. and select the relevant data source and click the “ Set Permission ” Add the user and give the relevant permission you want.