UltraDMD not registered
What it means
These tables ask for UltraDMD, and nothing answers to that name on this PC.
Why it happens
Some tables create their display with UltraDMD. FlexDMD can replace it, provided it is registered under that name from its setup tool.
How Pincab Toolbox detects it
The table script calls CreateObject("UltraDMD.DMDObject") outside a comment, and the UltraDMD.DMDObject key is absent from the Windows COM registry, in both 32 and 64-bit views.
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).