This was reported on the list this week.
It looks like lessons it trying to maintain two different sets of hibernate mapping files for 2.10 and pre 2.10. The oldhbm files need to have this in the hibernate mapping string instead of hibernate.org
In the 1.4.x branch simplepageproperty.hbm (https://source.sakaiproject.org/svn/lessonbuilder/branches/lessonbuilder-1.4.x/hbm/src/java/org/sakaiproject/lessonbuildertool/simplepageproperty.hbm.xml) has the wrong one (for trunk only) and that was what was tagged against 2.9.3.
Trying to bring this up without a network causes a startup failure because of this. I'm not going to bother attaching a patch because the fix is simple and slightly different for trunk verses branches.