Before you boot this game up, ensure that you have the Epic Games Launcher downloaded and updated. Find Hello Neighbor in your steam library, right click and hit properties, hit local files, then browse. Look for the Engine folder, then find the Extras folder, next go into the Redist folder, then the en-us folder. You will see something called UE4PrereqSetup_x64, double click it and ensure that you also have this downloaded before opening up the game.

After ensuring that you have all of that done, type env into your windows search bar and find ~Edit the system environment variables~. Make sure you are in the Advanced tab and at the bottom right you will see Environment Variables, click it. NOW MAKE SURE YOU ARE UNDER System variables and hit New...

For the Variable name: OPENSSL_ia32cap

For the Variable value: ~0x20000000

Hit Save and this should fix the problem.

Have Fun! :D

If the first way didn't work don't worry, here is another way! First go to AppData/Local/HelloNeighborReborn/Saved. Here you will find a tmp.hnb file, delete it. You will lose your save but it should let you play now.