I have a basic Camunda 7 setup on Apache tomcat and am currently trying to experiment with Parallel Multi Instance task. But for the most basic part which is about having a collection. I am absolutely unable to add a Collection variable through the console. I get the following error in the console for the input below.

I have combed through every resource and answer I could find online for a couple of days now. All say that the inputs are right but it just doesn’t work.
One of the attempts at debugging I was able to get a stringified Array through as a “String” variable and deserialize it using a execution listener on the sequence flow to the collection. This works as a test but in my final solution due to the architecture (and IP considerations) I cant setup such execution listeners.
Thus I really need to understand what is it that I have missed in order to just add a collection variable through the console.

P.S. This is my first S.O. question and also I’m a noob in Camunda so please help me update the details if needed.