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Blueprint runtime error.

I have a problem… When I compile the game I receive errors. Like this: Blueprint runtime error… The branch in the fight graph has a problem… How can fix it?

In the Event Check Hit Enemy workflow, try adding an Is Valid check on the output of your Get Closest Enemy function before connecting it to the branch. It could be possible that sometimes the function returns a null value which is then used to get actor location for the branch condition.