Thanks for posting your query in Ruckus forum.
As per your query,You are having issue AP joining to ZD,Precisely .APs syncing issue with ZD.
Please provide below mentioned details which will help us to offer adequate troubleshooting steps:
1.What is the firmware being used in ZD
(Refer to ZD GUI>>Dashboard>>system overview>>Software version)
2.Are APs and ZD in the same IP subnet.
3.Do you see APs (ZD GUI>>Monitor >>Access points) listed as "disconnected" or see no APs shown .
I would really appreciate if you could help us with above mentioned details.