COM component registered for the other 32/64-bit version
What it means
A component is registered, but only for the bitness that doesn't match the Visual Pinball actually installed.
Why it happens
32-bit and 64-bit COM registrations live in two completely separate parts of the Windows registry — a component registered in one is invisible to a process running the other bitness.
How Pincab Toolbox detects it
The COM view matching this installed VPX's bitness has no registration, while the opposite bitness's view does.
Automatic repair
Repair, included in the Pincab Toolbox licence, can fix this one for you.
Check your own pincab
Pincab Toolbox is a free Windows scanner for Visual Pinball X and PinUP Popper. It finds and explains problems like this one. No account, no telemetry.
Download for freeCovered: Visual Pinball X (10.x) and PinUP Popper. Not covered: Future Pinball, Pinball FX, Visual Pinball 9 and the other frontends (PinballX, PinballY).