The mod Extended Research Queue (0.5.7) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event factorio-research-queue::on_configuration_changed
factorio-research-queue/scripts/rqtech.lua:55: mining-productivity-4: level (22) > ,max level (4)
stack traceback:
[C]: in function 'assert'
factorio-research-queue/scripts/rqtech.lua:55: in function <factorio-research-queue/scripts/rqtech.lua:19>
(...tail calls...)
factorio-research-queue/control.lua:115: in function 'init_force'
factorio-research-queue/control.lua:187: in function <factorio-research-queue/control.lua:147>
