Not sure if it is exactly Rubia's fault, but... Factorio shows like it partially is?

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

Rubia does not touch that aspect of this prototype. Please confirm first by trying to boot without Rubia. If problems persist, please come back.

Hiya, I'm getting this too. I can confirm it does persist, calling out both spidertronpatrols and rubia with rubia loaded, and just spidertronpatrols without rubia. Let me know if you need me to do anything.

In case anyone else comes looking for a quick solution, the problem is entirely from Spidertron Patrols

SpidertronPatrols_2.7.0/prototypes/spidertron-dock.lua currently has

lua circuit_connector = circuit_connector_definitions["artillery-turret"],
The fix is to change it to

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

Rubia gets called out because it connects to SpidertronPatrols via rubia-surface-blacklist.lua (and maybe other files, I didn't go looking), but nothing needs to be changed in Rubia to get it working again. Shout out to @dazzo31 for this info and fix

Thank you for figuring this out. Please report this to the author of Spidertron Patrols, so he may fix it.