So it works when i have Aquilo from dredgeworks, or nauvis, but even when remove dredgeworks, if i try and select vulcanis or fulgora, the game crashes and gives this error... any ideas?

Failed to load mods: any-planet-start/asteroids.lua:21: bad argument #1 of 2 to 'pairs' (table expected, got nil)
stack traceback:
[C]: in function 'pairs'
any-planet-start/asteroids.lua:21: in function 'map_definitions'
any-planet-start/asteroids.lua:80: in main chunk
[C]: in function 'require'
any-planet-start/data-updates.lua:45: in main chunk

Any ideas?

Same error, different set of mods; selected Fulgora start when tested with All Planets pack and all their requirements.

Possible cause in my case could be Lignumis (which already changes the starting planet to itself, though that might be during runtime, not data phase?), Muluna (which adds another moon to Nauvis and shifts space science technologies around), or any of the other planet mods listed on the Information page (or one of their prerequisites)

I'm getting the same loading error with Vulcanus as starting planet.

As @Kryzeth suggests, disabling Muluna fixes the issue for me.

The loading error also disappears when I change to starting planet back to Nauvis.

This has been addressed. I have pushed an update to Muluna that implements support for this mod. In general, it seems that space connections with undefined asteroid spawn definitions cause this mod to crash. With this update, Muluna's starting location will follow the player's spawn planet.

Even though you've already fixed it on your end, I've done the same for this in case there are any future mods that do the same. Fixed in 1.1.8

Getting a similar issue:
failed to load mods: any-planet-start/asteroids.lua:30: attempt to index local 'main_connection' (a nil value) stack traceback: any-planet-start/asteroids.lua:30: in main chunk [C]: in function 'require' any-planet-start/data-updates.lua:45: in main chunk

The game launches fine when I set the start to a modded planet, crashes when start is set to Gleba.