Upgrade 11.5 to 11.6.1 - Navigation Menu Missing / Distribution Wizard Did Not Run

[SLA27]

I found a part of the answer in this thread :

Upgrade failure when upgrading from 11.5 to 11.6 on Debian 8.11 (SOLVED)

The log shows some: org.xwiki.extension.InstallException: Failed to initialize extension [org.xwiki.platform:xwiki-platform-watchlist-api/11.1] followed by: Caused by: org.xwiki.extension.InstallException: Failed to load jar file components This is for both org.xwiki.platform:xwiki-platform-watchlist-api/11.1 and org.xwiki.platform:xwiki-platform-watchlist-api/11.3 That does not look good, though I cannot think what is causing this. Removing the solr index seems to me a good idea, too, if …

Now the Wizard is running, but I Got some new errors