The mod D.A.R.T. (1.1.1) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event dart::on_surface_cleared (ID 126)
dart/scripts/dart.lua:1056: attempt to index local 'pons' (a nil value)
stack traceback:
dart/scripts/dart.lua:1056: in function 'handler'
core/lualib/event_handler.lua:72: in function <core/lualib/event_handler.lua:70>
For now all I can say it was probably caused by some fighting between the D.A.R.T. and that planet picker mod, that's my best guess