OKHi,
please send %temp%\ntlite.log at that moment?
If you did not press the upper left Cancel button on the toolbal, then a cancel is misread and should be fixed, should be readable from the log.
Thanks, but keep the negativity down.
Sent you a test version, it should now report the real error.
Should be the ISO is corrupted, a file cannot be read during prepare data phase.
Try to get another original non-edited ISO, or if you are 100% certain that ISO is valid, then DM me the newly mentioned file found in right-click loaded image Explore mount directory, then paste in File Explorer search to find it.
Why doesn't the older version have this problem? It's the same WIM file.Nothing in that regard was changed, file must be damaged.
Do other images have that issue, have you tried different ISOs, are they failing on a similar position?
Either way please DM me that file, or private send me the whole ISO if you can upload.