Problem Whit Rebar Style

Hello my friends, i have a problem with dynamo when i want to create a rebar.

I am using Dynamo for rebar but when i choose rebar style , its mark red , who can help me please, i try a lot opcion but never can use it.

I attach image.

What does the yellow icon say when you hover over it?


I solved the problem, i charged the rebar family and solved.