https://mods.factorio.com/mod/corrundum/discussion/678176b53901ab5b53b367a6

changelog Version: 2.0.7 Date: 20. 10. 2024
- On prototypes of entities with circuit connector removed circuit_wire_connection_points and circuit_connector_sprites but added circuit_connector.

Yep, simple fix. Just need to replace the two lines near the bottom of prototypes/entity.lua:

circuit_connector_sprites = circuit_connector_definitions["heating-tower"].sprites,
circuit_wire_connection_points = circuit_connector_definitions["heating-tower"].points,

with:

circuit_connector = circuit_connector_definitions["heating-tower"],