When uploading user/problems via JSON they import in the background, and the user has no way of knowing if it's working or when it's finished. As user's are successfully imported (or errors occur) show new users/problems or errors, and a popup when finished.
When uploading user/problems via JSON they import in the background, and the user has no way of knowing if it's working or when it's finished. As user's are successfully imported (or errors occur) show new users/problems or errors, and a popup when finished.