It says “Accessed None trying to read property ActorCheck”, but the game seems to work fine
I’m guessing you’re calling the function without setting this parameter
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How do I set it?
Can you do a picture of your call?
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Ok, it seems that value that had to be set was the Damage causer, it was in my AI blueprint when arrows are casted on actors. Thank you for help, hope this bug won’t appear again
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Accessed None is the most common beginner error there is! 
As you progress and grasp the logic of how everything communicates intricately with each other, you will be able to solve them with ease. Also, the lovely forums and amazing community is here to help, so feel free to ask if you get stuck. Best of luck to you.
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