Sorry for the trouble — this definitely isn’t expected behavior.
From your description (stuck at 0% / “Processing” and then failing), it’s likely related to decoding/encoding compatibility rather than normal usage.
A few things you can try:
Make sure you’re on the latest UniFab version (4.0.6.x)
Update or reinstall your GPU driver
Try switching to CPU mode (disable hardware acceleration) to see if it proceeds
Try another source file to rule out file-specific issues
If it still gets stuck or fails, please share the log file, that will help us pinpoint the exact cause.
