I haven't seen the log but I would try to reregister the number by deleting the yappari.conf file. EDIT: I just saw the log and definitely Whatsapp blocked you and I'm not sure if there's a way out of it. First time I see this. EDIT 2: I wonder if it has anything to do with the expiration but I would assume it would let you reregister and everything but wouldn't let you log in.
It definitely started with my expiration by UTC time today. However, I have tried the following and none has worked (in every instance I have rebooted the device and tested: 1-Generated a different expiration string from http://www.epochconverter.com/ but got block message. 2-Generated a different start of registration string but still got blocked. 3-renamed yappari.conf to yappari.conf.bak and still got "block" msg