I just notice that one chapter named "Threat Analysis & Coverage" is missing (not listed in TOC) in the "old" version of Security Blueprint.
This is due to a type (invalid extension .htm instead of .html) in url definitions (see toc_dev_en.yml line 52 )

Consequently, a review must be done to check if all information of this part "Threat Analysis & Coverage" has been transferred in the "new" Security Blueprint.