TileEntity

Add the new crash-report/log

Yes - but from the server world, backup the playerdata folder Copy the singleplayer world into the server and join it - if this works, overwrite the backup playerdata folder with the one in your server world

Did you test it with a new world? Also change the RAM allocation from -Xmx2048M to -Xmx4G

Also remove [1.12.2]-Epic-Knights-Armor-and-Weapons-6.2v(uncomplete).jar

Maybe an issue with performant or theabyss

Check the mods folder for musictriggers-1.12.2-5.3.jar Looks like this file is twice available - remove one

Start roaming around this world and visit your areas - then upload this world to the server

Yes - with tools like FileZilla (via FTB-Access), you can upload/download files from the server

If you are using AMD/ATI, go to their website and download/install the latest driver build If there is no change, or you are not using AMD, add the full crash-report with sites like https://paste.ee/ and paste the link to it here

Make a test without scalinghealth

You are not logged in In your Launcher, log out and back in Make a test with disabled firewall and anti-virus program Or a test with another Launcher like MultiMC, AT Launcher or Technic Launcher

Add the log from MultiMC - maybe there are some more information

Start without any mods - if this works, add these one by one or in groups

Maybe a mod adding/changing biomes - I have no idea

And without railways/Create Steam and Rails?

And without modernfix?

Make a test without NoChatReports

Remove wildwestgunsd - looks like it is a client-side-only mod

Replace it with this build: https://www.curseforge.com/minecraft/mc-mods/endofherobrine/files/4468174

Make a test with another Launcher like MultiMC, AT Launcher or Technic Launcher

Remove Java 17.0.10 and use 17.0.9 https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html Scroll down to 17.0.9

Can you load this world in singleplayer?

Backup and delete the server.properties file and restart the server

aquamirae is the last mentioned mod - backup the world and make a test without it