Error while running event Fluid-level-indicator::on_pre_surface_cleared (ID 112) Fluid-level-indicator/control.lua:30: attempt to index global 'surface' (a nil value)
stack traceback: Fluid-level-indicator/control.lua:30: in function <Fluid-level-indicator/control.lua:29>
This one is "Connection Indicators" (internally named "fluid-connection-indicators"). The mod that crashes in your report is Fluid Level Indicator which is a different mod.
