Blueprints work on one PC but not another?

I have been experiencing a weird issue where blueprints that work on my PC don’t work on my friends. We transfered the project folder as a zip. He has a nearly identical computer in specs. The blueprints are nothing out of the ordinary, simple code, yet it doesn’t work right.

Can you post the picture of the BP graphs in question?

Are you sure all the Engine setting are the same? Maybe you had some add-ons enabled that your friend doesn’t? Maybe the project references some assets from outside itself and can’t find them on your friend’s computer? Did you just copy the project folder and zip it or did you export it in due manner? Exporting finds all the references and includes them into the package, whereas simple copying won’t do that.