Looks like some of the base game sound files were removed; "base/sound/flying-robot-6.ogg" (plus 7,8,9,10, or whatever), which causes this mod to fail to load.

Seems to be resolvable by removing the
'''
,
{
filename = "base/sound/flying-robot-6.ogg", volume = volume
}
'''
(plus 7,8,9,10) entries in logistic-robot.lua in the first 40 lines.

I'm not sure what file you are referring to here. I am using:

    working_sound = flying_robot_sounds(),

which should pull in the standard sounds, and I don't explicitly refer to the sound files otherwise.

Re-downloaded this mod and re-tested with latest 0.18.x experimental (0.18.45 I think?), just to make sure I wasn't imagining things:
https://i.imgur.com/FbIPBSJ.png

I'm referring to the 'prototypes/entity/logistic-robot.lua' file (the only logistic-robot.lua file in this mod). Look at the first 40 lines. You are referencing 'flying-robot-6.ogg', which no longer exists in the base game files. Same for 'flying-robot-7.ogg', 'flying-robot-8.ogg', 'flying-robot-9.ogg'. None of these exist in my base game install, and I just ran the steam game cache verify to ensure I wasn't missing any files. Removing the entries for the non-existing sound files allows the mod to load.

I just uploaded 1.5.0. Can you test?

Seems to work fine. :thumbsup:

Thanks for the check :). Sorry I was out for a bit; covid work took over.