That means you havent actually made a statement in the decision that can evaluate to true or false.
i.e. $CountUserRole = 1 for example.
I guess there is an error in the decision expression, or it is still missing.
Once the expression is corrected, the condition value is enabled.
Removing all the '*' symbols from the expression should help. I'm assuming you copy pasted it and the copy pasted version will contain the '*' symbols.
Can you send condition written in the Descision?
I have tried to use $Task/CompletionDate != empty and $Task/DueDate != empty and it worked