“Cannot preview in this file - Connection interrupted: send previewInstances message to agent" error in Xcode 12

I've got a UIKit project and I'm slowly trying to move to SwiftUI, I created a SwiftUI file and I tried to preview it but I'm getting this error:

Cannot preview in this file - Connection interrupted: send previewInstances message to agent

This is my SwiftUI File:

import SwiftUI

struct LineChart: View {
    var body: some View {
        Text("Hello, World!")
    }
}

struct LineChart_Previews: PreviewProvider {
    static var previews: some View {
        LineChart()
    }
}

I only saw one similar question on StackOverFlow but that didn't help either, is there anyway that I could fix this? Appreciate the feedback!