Send a ZIP file for a server using kotlin and retrofit I looking for a way to send a zip file for a server using retrofit in kotlin. Some functions are deprecated that's make this more dificulte. When I star the request the response is NULL, there is no error. That is the function who start the request: fun sendZipeFile() { val retrofitClient = NetworkUtils .getRetrofitInstance("http://url.com") val sendZipeFileEndPoint = retrofitClient.create(SendZipeFile::class.java) var file =...