I just downloaded and tried Sigil 0.4.0RC1. I loaded a very simple HTML file with CSS (attached) and saved as ePub. When I verify, I get 4 validation errors:
1
Code:
OEBPS/Text/4.html
N/A
This OPS document is reachable but not present in the OPF <spine>. "Reachable" means that a reference of some kind that points to this resource exists in the epub.
2
Code:
OEBPS/Text/4.html
N/A
This resource is reachable but not present in the OPF <manifest>. "Reachable" means that a reference of some kind that points to this resource exists in the epub.
3
Code:
OEBPS/content.opf
3
The <language> element is missing.
4
Code:
OEBPS/content.opf
13
The <itemref> element is missing.
Number 3 I solved going to the metadata dialog and re-selecting "English".
For the rest I had to edit the opf manually.
Is this normal? This is the first time I use flightcrew.