Missing entities crash upon entering world.

[Finbez]

Bug Report

When I try to enter single player, I get this screen: https://imgur.com/a/QD4dtYb. Upon clicking "yes" to continue like I saw in other bug reports for this "missing entities" stuff, the game immediately crashes. Seemingly the world does not even load.

When I try to enter multiplayer, I get to the "Getting Started" tutorial(?) message and, upon clicking "close", the X at the top-right, or escape, the game crashes. Same deal. World probably isn't loading.

Expected Behaviour

Being able to join a single-player or multi-player world without crashing

Possible Solution

No clue. I installed the modpack via the Twitch app just the same as my friends on the server. I've reinstalled the modpack multiple times, restarted the computer, done everything I can think of to make it work.

Steps to Reproduce (for bugs)

1. Install Sevtech Ages 3.0.8
2. Run Sevtech
3. Try to join a Single-player world OR multiplayer world.

Logs

• Client/Server Log: I'll get back to this ASAP but right now I can't get in contact with the server host. This happens even in single player so I hope the server logs are not crucial.
• Crash Log: https://pastebin.com/aMKe3z6R this was all that was in the logs folder.

Client Information

• Modpack Version: 3.0.8
• Java Version: Java 8 Update 191
• Launcher Used: I launched by clicking "play" on the Twitch app and then used the minecraft launcher. I guess the minecraft launcher?
• Memory Allocated: 4.5gb
• Server/LAN/Single Player: Server & Single-player
• Optifine Installed: No
• Shaders Enabled: No

World Information

Modpack Version world created in: 3.0.8

• Additional Content Installed: N/A

[Stifling-Bossness]

I don't know if this is related to your crash, but you're using the default Java version (.0_51), not the .191 you have installed.

To tell Twitch to use that instead, go to Twitch settings -> Minecraft -> Launch method, and select the jar launcher. The next time you start up the pack, it will load the "old" minecraft launcher and have a prompt, something like reset settings. Just hit accept, then close and relaunch. Should be using the right java then.

[Finbez]

Uninstalled the old java version and swapped to launching with the most recent update. Sevtech still crashing.

[monodemono]

You're using the native launcher. Switch to the JAR launcher. The native launcher forces itself to run on a specific version of Java.

[Finbez]

Just tried the JAR launcher. Same deal. Here's the crash report: https://pastebin.com/NEMWRjvg

[Finbez]

whole month and basically no useful responses. lol