We do not support jailbroken devices, and WhatsApp will not work properly if your phone is jailbroken. If you wish to use WhatsApp and your phone is jailbroken, you should restore your iPhone to factory settings. For more information on how to restore, visit Apple Support.
Note: Jailbroken devices do not allow the WhatsApp security model to function as intended and your messages will not be protected by end-to-end encryption.
WhatsApp Support Team