What is supposed to happen: World loads normally
What happens: As soon as it finishes loading the world, it crashes the game (server side)

What it could be:
A block (Rocket assembler (?)) causes the crash due to being incomplete (?)

Lines:
Name: advancedrocketry:rocket_builder // zmaster587.advancedRocketry.tile.TileRocketAssemblingMachine Block: Block{advancedrocketry:rocketassembler}[facing=east,state=false] Block location: World: (476,123,392), Chunk: (at 12,7,8 in 29,24; contains blocks 464,0,384 to 479,255,399), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Block: Block{advancedrocketry:rocketassembler}[facing=east,state=false] Block location: World: (476,123,392), Chunk: (at 12,7,8 in 29,24; contains blocks 464,0,384 to 479,255,399), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)

Crash report
crash-2023-06-24_20.30.45-server.txt

Great way to finish the modpack