Shuffle Array Binary Operator Error

Question

I looked at a similar problem in the Shuffle Array Swift 3 post and tried the code from the Answer, but I still get the same error on the same line.

        let j = Int(arc4random_uniform(UInt32(countArray - i))) + i

The line above throws the error:

Binary operator '-' cannot be applied to operands of type 'C.IndexDistance' and 'Range C.IndexDistance'

Entire function:

//function used to shuffle imageArray
func shuffle<C: MutableCollection>(_ imageArray: C) -> C where C.Index == Int {
    var imageArray = imageArray
    var countArray = imageArray.count

    for i in [1 ..< countArray] {
        countArray = imageArray.count
        let j = Int(arc4random_uniform(UInt32(countArray - i))) + i
        swap(&imageArray[i], &imageArray[j])
    }
    return imageArray
}

Revised Code (below) Still Returns Same Error:

Binary operator '-' cannot be applied to operands of type 'C.IndexDistance' and 'Range C.IndexDistance'

//function used to shuffle imageArray
func shuffle<C: MutableCollection>(_ imageArray: C) -> C where C.Index == Int {
    var imageArray = imageArray
    var countArray = imageArray.count
    for i in imageArray.startIndex ..< imageArray.endIndex-1 {
        countArray = imageArray.count
        let j = Int(arc4random_uniform(UInt32(countArray - i))) + i
        swap(&imageArray[i], &imageArray[j])
    }
    return imageArray
}