The form cannot be rendered. This may be due to a misconfiguration of the Microsoft SharePoint Server State Service. For more information, contact your server administrator.
Easy solution for this error is we have to enable the State Service for the current web application.
For this error there are three possibilities to check .
1)In Central Administration-> Application management ->In Service Application->Manage service application
Check weather State Service is started or not.
If it is already started then go for another solution.
2)Go to Central Administration-> Configuration Wizards → Farm Configuration →Select Start the Wizard.
Click on Start the Wizard
Check weather State Service is checked or not. If it is checked click next
Skip the Step->Finally click Finish.
3)Central Administration-> Application management->Configure service application associations
Click on the web application that your a facing this Issue,here my state service is disabled.
Enable and check it once..
Finally click OK...and reload the page it will work 100% -:)