The mod Selector Combinator (Factorio 2.0 preview) (0.2.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event pigo-selector-combinator::on_tick (ID 0)
Constant combinator: invalid signal in parameters: signal-each
stack traceback:
[C]: in function 'newindex'
__pigo-selector-combinator/scripts/entities.lua:250: in function 'update_single_entry'
pigo-selector-combinator/scripts/entities.lua:347: in function <pigo-selector-combinator/scripts/entities.lua:345>