jessie is bang up to update, not outstanding updates to be installed.>
i will post the results of those later today.
OK. Sorry for some “stupid” questions. It’s always hard to access the overall knowledge of the user and the quality of the setup. However, I would not know that there is a nginx server in between, if I had not asked, and the faulty certificate was also huge problem I suppose your nginx setup was only working OK all the time, because secure connections were not possible at all (missing certificate).
So, assuming that everything else is OK by now, you have to access your Pi server from the local network (same subnet as the server) on
local-ip:32400/web and check the remote access. It might also be a good idea to log out of your server and to reclaim it afterwards.
To complete the setup, you have to make sure DNS rebinding protection is disabled in your router / local PC. It’s best, if you just read the whole secure connections article, because most of this might be new to you.