I might be totally in the wrong but when I got this error on another cms it turns out that the root of the problem was the php version. Maybe try to change that?
Yes add in the emulator to the inbound rules and allow the connection for everyone just like you did with the ports. If the emulator doesn't receive any connection then it has something to do with your configuration (emu/client.php) or swfs, check to see if everything is set properly.
Do you mean the hotel view? If so, check if the emulator receives any connection. If it doesn't than check the client ip and see if the directories on the swfs are all pointed in the correct way.
The index works fine, but when it comes to the register page it appears this error: http://prnt.sc/bm2d5c
Also, in the /me page it appears something like this: ERR_TOO_MANY_REDIRECTS (I've tried to clear the cache, and also purge the cache of cloudflare)
Help!
Oh well, I fixed simply by...