The mod Mining Drones (0.3.21) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Mining_Drones::on_ai_command_completed (ID 115)
on_resource_depleted (ID 25) (25) can't be raised through script.
stack traceback:
Mining_Drones/script/mining_drone.lua:290: in function 'process_mining'
Mining_Drones/script/mining_drone.lua:410: in function 'update'
Mining_Drones/script/mining_drone.lua:569: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>
stack traceback:
[C]: in function 'raise_event'
Mining_Drones/script/mining_drone.lua:290: in function 'process_mining'
Mining_Drones/script/mining_drone.lua:410: in function 'update'
Mining_Drones/script/mining_drone.lua:569: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

Sending this for support. Please let me know if you need any info for me. :)

Tried to revert to 18.26 but can't open map because I was playing in 18.30 :(

Note sure what to do. if anyone has any suggestions, please let me know.

Windows 10 pro, i5 3320m 2x4 GB RAM.

Just did an update. working fine so far. :)