A lot of times this issue is not always on your end but also the end of the grid the avatar is coming from. I have seen this several times again and I think sometimes the grids try to tp to are too busy to hand off connections. If you look @ the logs you will see where it shows there is a timeout in the connection of the grid the user is coming from then your system rejects it because the identity packet is not handled properly. Most of the times there is no changes you can make on your end instead the grid they are coming from needs to look @ their set up. Hope this helps..

First things I check when a server is no longer reachable is both the local and public IP's. ie be sure your server's local ip ( 192.168.*.**) hasn't changed from the one you port forwarded and that http://reserectedworlds.ddns.net is still pointing at your current Public IP. https://www.canyouseeme.org/

To start with the question would be whether you are using Diva distro .8.2 or .9.* Also are you using it through the Outworldz application? If you are I would suggest going to https://mewe.com/group/5bc12bdc322b35103f0965d3 as that group deals specifically with Outworldz and Diva Distro with WiFi.

Nowhere near enough information for anyone to be able to troubleshoot but on the clues i do see, I would suspect you are trying to mix and match the standalone and grid mode architectures.