Any help with Robotics Playground toolbox, please?

I'm using the Robotics Playground toolbox. When I drag the distance sensor to the model and simulate, it pops up an error message like this:

How can I solve this ?

[Sajid Afaque]

I guess , you forgot to attach a snippet

Answer 1

[Jose Avendano Arbelaez]

Did you already drag an environment block from Robotics Playground library?

Might also be worth starting from one of the example models. It could be a deleted variable from the workspace as well. Try making sure you have an environment block.