Blueprint Runtime Error: "Accessed None trying to read property K2Node_DynamicCast

Development Programming & Scripting
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1

HI am getting an error that pops up now when an AI seems to follow my player going through a trigger box which controls a blend camera.
Was working fine when it was just the player on its own, but as soon as I add the AI character this pops up
Ive tried to use a branch to check if the overlapping actor is the player but that did not work and cannot work out where the error is. Please could someone help as I am more of an artist as apposed a programmer

Error_Help
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2

Do not attempt to use data from another execution flow, there’s no guarantee it’s valid.

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If you need to access the data in the very bottom part of the script, you must also perform the cast there.

3

Thankyou!!!
A few more hours to sit through tutorials me thinks