Hi, sorry for the late reply !
I was searching a bit into it to make sure it doesn't come from my end while uploading. I haven't received any other complaint about it as of now.
From what I've seen online, it may come from an error when downloading the game or depending on the software you use to unzip the files. Apparently, this error can occur while using WinRar.
The only thing I can suggest right now is try downloading again or use 7zip if you're not already using it instead of WinRar.
I hope that'll help !