Aoetec Z-Stick error messages

I have added a Kwikset lock to my Homeassistant setup with the Aeotec Z-stick Gen5. I added a network key and added the lock as a secure node. I can open the lock using HA interface. The problem is that am unable to add any more Z-wave devices with the HA interface or the OZWCP. Where can I find what these error messages below mean?
I have tried soft and hard reset of Z-stick without seeing a change. I am considering opening the Z-stick and disconnecting the rechargeable battery to force a cold reset. I tried Soft_Reset and Reset in OZWCP but nothing changed.

2017-02-26 17:36:18.259 Detail, Node003, AdvanceQueries queryPending=1 queryRetries=0 queryStage=Probe live=1
post: key=fun data=addd size=4
2017-02-26 17:36:43.149 Detail, Queuing (Controller) Add Device
2017-02-26 17:36:43.149 Info, Add Device
2017-02-26 17:36:43.150 Detail, contrlr, Queuing (Command) ControllerCommand_AddDevice: 0x01, 0x05, 0x00, 0x4a, 0xc1, 0x20, 0x51
2017-02-26 17:36:43.150 Detail, Notification: ControllerCommand - Starting
2017-02-26 17:36:43.150 Info, Notification: ControllerCommand home e68302e8 Event 1 Error 0
2017-02-26 17:36:43.150 Detail,
2017-02-26 17:36:43.150 Info, contrlr, Sending (Command) message (Callback ID=0x20, Expected Reply=0x4a) - ControllerCommand_AddDevice: 0x01, 0x05, 0x00, 0x4a, 0xc1, 0x20, 0x51
2017-02-26 17:36:44.150 Error, contrlr, ERROR: Dropping command, expected response not received after 1 attempt(s)
2017-02-26 17:36:44.150 Detail, contrlr, Removing current message
2017-02-26 17:36:44.150 Detail, contrlr, Notification: Notification - TimeOut
2017-02-26 17:36:44.150 Info, Notification: Notification home e68302e8 node 255 Timeout
2017-02-26 17:36:44.150 Detail, Notification: ControllerCommand - Error - Failed
2017-02-26 17:36:44.150 Info, Notification: ControllerCommand home e68302e8 Event 3 Error 10
Failed to receive data: Connection reset by peer