This bug is specific to Factorio versions 0.18.xx. Following is error code attempting to open a map created in version 0.17.79:
-- ERROR NOTICE START
The mod dangOreus caused a non-recoverable error.
Please report this error to the mod author.
Error while running event dangOreus::on_configuration_changed dangOreus/control.lua:attempt to index local 'current' (a nil value)
stack traceback:
dangOreus/control.lua:631: in function 'divOresity_int'
dangOreus/control.lua:676: in function
<dangOreus/control.lua:676>
--- ERROR NOTICE END