Error while running event robotMiningSite::on_tick (ID 0)
robotMiningSite/libs/control/entities.lua:99: attempt to index field 'schedule' (a nil value)
stack traceback:
robotMiningSite/libs/control/entities.lua:99: in function 'entities_tick'
robotMiningSite/control.lua:101: in function <robotMiningSite/control.lua:100>

Got the same error

Make that three, I got the same error as well.

Same here:

The mod Robot Mining Site (0.10.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event robotMiningSite::on_tick (ID 0)
robotMiningSite/libs/control/entities.lua:99: attempt to index field 'schedule' (a nil value)
stack traceback:
robotMiningSite/libs/control/entities.lua:99: in function 'entities_tick'
robotMiningSite/control.lua:101: in function <robotMiningSite/control.lua:100>

Just a note, the error happen even if you load a saved game after enabling the Robot Mining Site mod.
Just a +1 info for explain that it's not only for new game, but entering any game with the mod active.

Fixed in v0.10.2