No IBOutlets initialized. I had to assign them manually at the end of xibSetup taking them from the view which got loaded from the Nib, like so:

func xibSetup() {

guard let view = loadViewFromNib() else { return }

view.frame = bounds

view.autoresizingMask =

[.flexibleWidth, .flexibleHeight]

addSubview(view)

contentView = view

topLabel = contentView?.topLabel

imageView = contentView?.imageView

}