Cannot show the editor for this task.

I got this error in SSIS when I try to open Execute SQL Task.

 

Then I tried to open already configured Execute SQL Task in some other SSIS packages. Still the error exists. I was wondering this is an error in SQL Server 2014 so I installed SQL Server 2012 and tried but it was no difference.

So the work around is by clicking F4 and enter the configuration values in the Properties box.