I am using the Tencoder portable app, (installed on a thumb drive) and got the following message while trying a dvd rip
Assertion v>0 && v
New: PeerBlock Plus (Dec 04, 2023), Platform 27.0.1 (Dec 03, 2023)
450+ real apps (49GB), 1.1 billion downloads, Please donate.
Now Accepting Wire Transfers, Testing Ad Placements
TEncoder has not received any updates for 3 years, so you may be running into a DRM issue, I ran into a different DRM-related issue when I attempted a DVD rip to confirm your problem.
Please try using the installed version, to ensure the problem is not with TEncoder itself.