Not inside a circuit, just in SE orbit this time, but also happened on Nauvis.
Sometimes happens also if I manually place a missing entity from a blueprint (I didn't have a normal power pole, so I tried to place a lighted pole instead)

The mod Integrated Circuitry (Fixed) (1.1.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event integratedCircuitryFixed::on_robot_built_entity (ID 14)
Target entity is not electric pole: cannot disconnect copper wire.
stack traceback:
[C]: in function 'disconnect_neighbour'
integratedCircuitryFixed/control/circuit-pole.lua:15: in function 'circuitPole_build_electric_pole'
integratedCircuitryFixed/control.lua:75: in function <integratedCircuitryFixed/control.lua:65>

I think I have a testcase. Pasting this blueprint, if it's in range to a power pole (so it would connect) it crashes. Is no other power pole is in range, it pastes ok

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Thanks for the report, I'll have fix this weekend.

Hi, I got this error while playing (multiplayer)
https://imgur.com/4jhYHYa

1.1.3 should fix this, and if it does, then I have kept my promise of havnig fix this weekend, as it is still Sunday here :)