Spidertron Patrols 2.7.0 fails to load on Factorio 2.1.20/2.1.21:

Error while loading entity prototype "sp-spidertron-dock" (proxy-container): Value must be a list in property tree at ROOT.proxy-container.sp-spidertron-dock.circuit_connector

Cause: circuit_connector is now array[CircuitConnectorDefinition] (one entry per direction_count). prototypes/spidertron-dock.lua passes a single definition:

circuit_connector = circuit_connector_definitions["artillery-turret"],

Fix — wrap it in a list:

circuit_connector = {circuit_connector_definitions["artillery-turret"]},

Confirmed working locally with this one-line change.

Fix worked for me, thanks <3

thanks for the temporary fix

Same problem ugh!

Same problem!

This does look like the update messed it up. I was force updated to 2.1.21 from 2.1.20 which I believe was stable.

Also extracting it has lots of addition files like .github folder. FYI mod author probably best to remove some of this.

Failed to load mods: Error while loading entity prototype "sp-spidertron-dock" (proxy-container): Value must be a list in property tree at ROOT.proxy-container.sp-spidertron-dock.circuit_connector
Modifications: Spidertron Patrols › ○🌐Rubia

@Cylindryk Rubia isn't the cause, it just gets listed because it touched the prototype: it bans the dock from Rubia's surface (rubia-surface-blacklist.lua → ban_from_rubia writes surface_conditions). The actual breakage is still the non-list circuit_connector above; the one-line fix in the first post should work with Rubia installed.

@Cylindryk Rubia isn't the cause, it just gets listed because it touched the prototype: it bans the dock from Rubia's surface (rubia-surface-blacklist.lua → ban_from_rubia writes surface_conditions). The actual breakage is still the non-list circuit_connector above; the one-line fix in the first post should work with Rubia installed.

One line fix? But where? How?
Orginal post kinda don't really explain that to how to really fix it...

Pulling from the original post, this is what worked for me just now:
SpidertronPatrols_2.7.0/prototypes/spidertron-dock.lua currently has

circuit_connector = circuit_connector_definitions["artillery-turret"],

The fix is to change it to

circuit_connector = {circuit_connector_definitions["artillery-turret"]},

Sorry for the delay, fix published

thank you!