Error: "Blueprint Runtime Error: Accessed None trying to read property (...) from Branch

Hi everyone! I have a problem. I wanted active a variable when my character attack.
I tryed to print a text to check if the reference of my variable if my variable is actived but I don’t arrive to print a text when I attack.
Can I have a solution please? :frowning:

You should post the entire error message.
But I’m going to make a guess that you are not setting the reference?