Sorry to necro an old thread, but it might help someone.
Actually yes. When I upgraded to XWiki 11, I attempted to get SSO working again. I had to give up on jetty/ nginx and switch to apache tomcat/ httpd. However, then everything did work.
I don’t really know why I didn’t go this route to begin - I think it was because some documentation said mod_jk wasn’t available for RHEL/CentOS 7 and I didn’t want to start compiling from scratch, however, it wasn’t even needed.