TKB Home TZ88E - ERROR adding the node. Cannot setup security scheme

Hi

For the life of me I cannot get my TKB Home TZ88E plug to include, I’ve tried device/node resets, exclusions, then inclusion - but each time it gives me the following error.

This appears in the blue bar at the top

ERROR adding the node. Cannot setup security scheme.

And if it stays in the UI, as a node/device, the extended error message is this…

Z-Wave device 156 ERROR: Failed to setup security. Please exclude this device from your system, and then include again…Z-Wave device 156 ERROR: Failed to setup security. Please exclude this device from your system, and then include again.

Does anyone have any ideas ?