import Foundation

struct RGBValue: Codable {
let blue, green: Double
let timestamp: String
let red: Double
}

struct RGB: Codable {
let fps: Double
let heartRate: Int
let rgbValues: [RGBValue]

static let rgbData: [RGB] = Bundle.main.decode(file: "hrv_data.json")
static let sampleData: RGB = rgbData[0]

}

extension Bundle{

func decode<T: Decodable>(file: String) -> T {
    guard let url = self.url(forResource: file, withExtension: nil) else {
        fatalError("Could not find (file) in the project!")
    }
    guard let data = try? Data(contentsOf: url) else {
        fatalError("Could not load (file) in the project!")
    }
    
    let decoder = JSONDecoder()
    
    guard let loadedData = try? decoder.decode(T.self, from: data) else {
        fatalError("Could not decode (file) in the project! error : (Error.self)")

    }
    return loadedData
}

}

This is the entire code snippet which shows no error, but while run time it crashes “Thread 1: Fatal error: Could not decode hrv_data.json in the project! error : Error”
How to solve the issue and know the reason behind this error?