FitTrackee/fittrackee_client/src/locales/en/error.json

{
  "UNKNOWN": "Error. Please try again or contact the administrator.",
  "APP_ERROR": "The application seems encounter some issues.<br />Please try later or contact the administrator.",
  "NOT_FOUND": {
    "PAGE": "Page not found",
    "WORKOUT": "Workout not found"
  }
}