Problem updating to 11.10.3 (No Distribution Wizard, Extensions not working, No Panels)

[crw]

This sounds a lot like my problem, problem and resolution here:

Wiki functions, but missing major functionality after upgrade

I made a big mistake, and updated Ubuntu from 16.04 (java 8, tomcat8) to 18.04 (java 11, tomcat8) at the same time as upgrading the wiki from 11.2 to 11.6.1. I now have the following symptoms: No Distribution Wizard, even after following the instructions here: https://www.xwiki.org/xwiki/bin/view/Documentation/UserGuide/Features/DistributionWizard#HTroubleshooting No Navigation, either in the left-hand Navigation Panel or in the Breadcrumb drop-downs. The Navigation Panel is just blank, the dr…