RenderInvisibleControls property does not exist

I have IW 16.1.8 installed into Delphi 13 (Enterprise) on 2 machines. On one machine, I can open an IW form, no errors. On the 2nd machine, when opening an IW form, I get "renderinvisiblecontrols does not exist". Searching for BPLs gives the same list of files/dates/size named *intraweb*.bpl on both machines.

What am I missing?