I was doing some rather hasty blueprinting with a small circuis settup on a landfill island while I got this

The mod ⚠️ SearchlightAssault ⚠️ (2.3.17) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event SearchlightAssault::on_player_setup_blueprint (ID 83)
Index out of bounds: 101
stack traceback:
[C]: in function 'set_blueprint_entities'
SearchlightAssault/control-items.lua:45: in function 'SwapToBaseEntityType'
SearchlightAssault/control-items.lua:104: in function 'SeekBlueprints'
SearchlightAssault/control-items.lua:125: in function <SearchlightAssault/control-items.lua:114>

I have quite a few mods. Im not sure I can reproduce this anyways

Thanks for reporting this.

I haven't been able to reproduce it either, but I'm keeping a note to prevent this in the future, someday.

Following up, I've started having the exact same error over one hundred and forty hours into a modded multiplayer save I'm running for myself and a few other people, no idea why it's just started and it doesn't happen every time, especially since not one of us has ever placed or even crafted a Searchlight.

...maybe it's an interaction with the Lighthouse Radar mod causing it? I did just recently add that mod, last night, in a failed attempt to update the Cargo Ships mod (it had a load-up error involving the cargo ship's bounding box or something, so I had to revert).

I'll try disabling Lighthouse Radar and see if it still has the same error.

...nevermind, cannot disable Lighthouse Radar because the mod author made it a forced dependency for Depths of Nauvis on all versions, even though I'm using a version from before it was added as said dependency.

Fun, time to see if I can go into the files and remove said dependency, unless someone else wants to check?