Log-in issue after migrating to V7 platform

Hi
I have migrated my application to the Platform version 7.0, but failed in log-in. After I have entered by log-in credentials correctly I am getting the following error:

image

Do I need to define a root screen in V7, How?

regards

There should be an exception in server log which is a root cause of the problem.

Thanks, solved the issue, the problem was in the sideMenu.

Could you tell me how to solve this problem,Thanks!

There was another exception caused the reported exception. Please check what is the primary exception.