Rear Axle loose on Kickr Core Zwift One (WKCZO) [April 25, 2024]

You need adapters on BOTH sides!!! Looks like you didn’t install the drive-side adapter.

Are you sure you need the 148 adapter? Normal width of a roadbike thru-axle is 142mm (142x12mm). Is there anything printed on your thru-axle?