1. Minecraft version: 1.12.2
2. Galacticraft version: GalacticraftCore-1.12.2-4.0.2.244
3. GalaxySpace version: GalaxySpace-1.12.2-2.0.12
4. AsmodeusCore version (for 2.0.1 version and above): AsmodeusCore-1.12.2-0.0.13
5. Side (Single player (SSP), Multiplayer (SMP), or SSP opened to LAN (LAN)):
   OPEN TO LAN

Description of the issue:
it says a fatal error occured when trying to join a local world (open to LAN)

give log without animania

debug.log
latest.log

Caused by: java.lang.NullPointerException
at com.animania.network.client.CapSyncPacketHandler$1.run(CapSyncPacketHandler.java:25)

but it doesn't happen with galaxy space 2.0.11

redownload build and try

i downloaded it 15 mins ago.

Hey uhm, it happens without animania too. i tried with galacticraft + galaxy space only, u cant join to LAN world. please fix it. thanks.

@BlesseNtumble
With:
GalacticraftCore-1.12.2-4.0.2.244
Galacticraft-Planets-1.12.2-4.0.2.244
MicdoodleCore-1.12.2-4.0.2.244

GalaxySpace-1.12.2-2.0.12
AsmodeusCore-1.12.2-0.0.13

u can't join a local world. hope u fix it. thanks.

Same problem

Strange, when trying to play multiplayer, namely when connecting writes: "Fatal error". This is not available in early versions. And the error is only for those who connect. For example, if you start a local host, the one who connects will crash, and if you start the server as a client, it will start, but those who connect to this server will immediately crash with the same error, even if this server is on your PC. Again, there is no such thing on previous versions. There are no conflicting mods and there was no problem with the new version. The log window is not shown, because there is no crash, there is only an internal network error....

@BlesseNtumble i'm still here for any troubleshooting.

I got the same issue too, im using the previous version for the time being

@BlesseNtumble i tried the latest build u uploaded about this crash, and i can't even create a new world. can you? it gives the same error while trying to create new world. then it returns to the multiplayer screen. i think u mixed singleplayer and multiplayer worlds in code.
debug.log
latest.log

it's fixed on my side in the latest build.