sti,

If you use the same number in Whatsapp in another device, Yappari stops working. That's fixed in the next release (Yappari will force you to re-register).

If you're in 0.0.13 or less delete the file /home/user/.config/scorpius/yappari.conf and start Yappari again, register again, and that's it.

In the next release Yappari will know automatically that you screwed up (you shouldn't use your number in another device) and will force the re-registration.

(In Android the client asks you to register again in the same conditions).