UE4.13.2 Keeps Crashing on Startup ("Serialization Error: Action Needed - Corrupt data found, please verify your files")

Hello! Hope ya’ll are having am awesome day/night. I was just facing this issue with my Unreal Engine 4.13.2 that whenever i launch it, it crashes at like 35% and an error message saying “Serialization Error: Action Needed - Corrupt data found, please verify your files” appears. I’ve verified the UE4 files over 5 times and once even downloaded UE 4.26.2 but the error just doesn’t seem to have been fixed.I’m on UE 4.13.2 right now and I need help. Hope you guys will reply soon…

P.S I’m on a MacBook Pro running v.10.11.6 (El Capitan)
Here are my specs:
Intel 2.26 GHz Core 2 Duo Processor
4GB x2 1333 MHz DDR3 RAM
NVIDIA GeForce 9400M 256 MB Graphics

Unreal Engine was working just fine until yesterday night. My PC specs might not have anything to do with this error but i feel like i should share these aswell…