not working with Nullius.
Only iron ore spawns, and bitters also spawn at the start

I can see that it's config is disabled atm - I did that with all the mods after 2.0. I'm now using 2.1 and releasing only for it atm.
I'm not sure if I will be going back to 2.0 version to enable it - you can try to enable it on your copy to see if it still works. There is a commented out section for Nullius in mainconfig.lua.
I will enable it on 2.1 for when it's available.

I left a thread at forum that fixed Nullius:
https://forums.factorio.com/viewtopic.php?t=134481

You need to uncomment Nullius config function, it's commented, in mainconfig.lua:
-- if script.active_mods["nullius"] then
-- fillNulliusConfig(config)
-- config["enemy-base"] = nil
-- end
--

Change config["nullius-sandstone"] to config.nauvis["nullius-sandstone"],
config["nullius-bauxite"] to config.nauvis["nullius-bauxite"],
config["nullius-limestone"] to config.nauvis["nullius-limestone"]
config["nullius-fumarole"] to config.nauvis["nullius-fumarole"]
config["iron-ore"] to config.nauvis["iron-ore"]
in nullius.lua

And also there's another quirk, nullius landfill is implemented as "dummy surface" will crash the game so you need to fix that as well:
in control.lua, add early return on spawn_starting_resources. In other words, change this:
local function spawn_starting_resources( surface, index )

local surfaceData = storage.surfaces[surface.index]
debug("Starting area spawn for "..surface.name)
if surfaceData.startingAreas[index].spawned then return end

to this:
local function spawn_starting_resources( surface, index )

local surfaceData = storage.surfaces[surface.index]
debug("Starting area spawn for "..surface.name)

if not surfaceData.startingAreas[index] then return end
if surfaceData.startingAreas[index].spawned then return end

After that nullius works like a charm for me

I can add the defensive fix easily but config update would need to wait until Nullius will get a 2.1 compatible version.

There's literally only those changes, obviously I didn't test everything but you can just change 'config' to 'config.nauvis' since obviously it wasn't updated since before 2.0 and it should be alright. It's the same for tricky-old-nick.
While you all working for 2.1, people still play 2.0 :( I would much rather not go deep into the mod trying to understand why it didn't work, so... while i get focus on 2.1 but... idk

The main hurdle is the need to keep ideally 2 separate Factorio versions to be able to check if edits work correctly and there are no typos etc.
And with 2.1 being not that much of a change I did not expect the need to keep 2.0.

Can you post me the nullius config file somewhere since thats the one thats most difficult to test? I can make other edits and try to do a release. You can attach it on forums that might be fastest.

Here's github gist:
https://gist.github.com/Ignalion/b4d1a8675b31bbbe9b77c541917fd0a2

It's up should be ok - please check if it works.