The bug is already filed& fixed in 5.5
As a workaround ensure to make default selection for radio& checkbox
need further assistance pls file daycare ticket
I forgott to mention that I've already installed CQ5.5.
Unfortunately, I see this bug not fixed yet.
Note: it's the multifield (xtype="multifield") that's bothering me.
This has nothing to do with the radio or checkbox field. There's no default selection possible.
It is NOT fixed in 5.5. We are seeing this error with a new installation of 5.5.