Dynamo node output is null, even though there are inputs associated to it

I am learning how to use dynamo, I am trying to create lists and putting numbers on the input, but the lists output are showing a null value, what is this problem, and how can I solve it? Te version I’m using is 2.0.3

Click Run???

It is already set to run automatically, and even when I set it to run manually and click on run, it stills return null. This bug happens when I open a file, if I create a new one it works properly

Try restarting your CPU.

seems similar to this bug: