Error navigating to Plan tab inside the application container

I am getting the below error while navigating to the Plan tab inside the application container. 
Any possible solutions or suggestions to fix it.
This issue also not letting me to open the application from designer. 

The System Has Encountered an Error

HTTP Code: 500 APNX-1-4198-000 Error Evaluating UI Expression Expression evaluation error [evaluation ID = e7f4a:bc82f] : Cannot invoke "com.appiancorp.core.expr.portable.Value.getType()" because "value" is null