That shouldn't be the case if you're able to download the game, we don't use any form of encoding beyond Unity's basic functionality.
However if the issue is occurring when trying to actually download the game then it may be an issue with our file host mega.nz. They encrypt data with a key that is required for decryption.
When using the link provided make sure it has the full URL present, as the decryption key is included in that URL.