OpenSimulator 0.9.2.1 was released a few days ago. While upgrading my development grid from 0.9.2.0 I figured out an essential change (at least in my case) that you might need to consider as well:
During startup I noticed error messages in the simulator console like
...Error: TrustFailure (Authentication failed, see inner exception.)...
If you run your Joomla with a LetsEncrypt certificate, it seems the built in flotsam-groups module (used for jOpenSim groups) has now issues verifying them with current ini settings resulting in unable to get group informations.
In my case 2 additional lines (seen in the new original OpenSim.ini of 0.9.2.1) in the section [Startup] solved this issue:
NoVerifyCertChain = true
NoVerifyCertHostname = true
;; having both options true does provide encryption but with low security
;; set both true if you don't care to use SSL, they are needed to contact regions or grids that do use it.
The comment is a little unlucky choice, the connection is STILL encrypted
I hope this helps someone running into same issue
Greetz
FoTo50