You JUST beat me to this issue :)
Am I assuming you're trying to connect to a server? Could you get a hold of the server logs also? This will help with working out what's going on.
would like to add my server log not sure on server hosts os but im running w10 in case it will help
https://gist.github.com/TwilightPSN/cbce0fb7407d2a99e27e93e4f5dbd2cb
server log:https://pastebin.com/TWT4GdHC
Caliper needs to be removed from the server side. Can you do that and try again @TwilightPSN
This issue can also be linked to broken uploads of files to the server. So can you all/person try a complete wipe of the mods folder and re-upload all the mods. (Also make sure your libs and Forge version are correct and up to date)
@jlnarron that's not a full server log. Pastebin the entire thing please along with your client logs. So we have both to compare/review.
@artdude543 https://gist.github.com/TwilightPSN/178c4c3f6c9fa1eafe9cc6804b2ca2cd removed caliper on the server still same issue ive also reuploaded mods about 3 times
client side https://gist.github.com/TwilightPSN/bf2d60460cd52bec7931eb9481b55395
I believe this is an issue with Crafttweaker. The zipped file on linux is not properly being handled.
I run all my servers on Linux and their running fine on the new release. So I doubt it's that tbh.
People unzipped and created a new world and it seems to work...
Okay, I can reproduce on my Rasperian instance but Ubuntu seems fine. Either way, there were some changes to ZenScript which according to the code fixed Linux cases. Not sure if the build of CT we are using contains that update to Zen.
We are using a zip this time, im curious if its related. Can you get me the crafttweaker.log file?
We should be on the latest Crafttweaker
Crafttweaker.log from an erroring server https://gist.github.com/justinrusso/8d4fe7ff1393fc03a6a249a9aee87cf8
I too am getting, what I believe to be. the same error with my Server install.
I installed the server via copying my install from my Windows machine to my Linux Server (Ubuntu 16.04). I then setup forge-1.12.2-14.23.2.2634-universal.jar (I ran the installer for that version). I then have a script that starts the server (using the additional parameters provided to Sev). It's like the server loads fine but whenever a user tries to connect, they get the "Fatally missing registry entries" error.
My latest.log file:
latest.log
My debug.log file:
debug.log
Has anyone found a fix? I'm trying to run it on a hosted server. Everyone is getting fatally missing registries when they try to connect and sometimes it says authentication servers are down but they arent down.. The full log is so big i cant even put it on paste bin to link it because of all the scripts text.
Is this a possible issue?
An update is in the works for Twitch App, and the ATLauncher release will work fine.
If youd like to do this manually, go into minecraft/scripts and unzip scripts.zip into the scripts folder. It should result in something like the following:

Thank you @justinrusso for explaining that and the image. That fixed the issue. We have completed stage -0 "get the server up and running". :)
There is now a patch out (3.0.1) that fixes this as well.
Most helpful comment
An update is in the works for Twitch App, and the ATLauncher release will work fine.
If youd like to do this manually, go into
minecraft/scriptsand unzipscripts.zipinto the scripts folder. It should result in something like the following: