"Filament run out" indicates that the filament on the spool holder has been used up and needs to be manually replaced with new filament.
Replace filament manually: Follow the method K2 Plus Filament Runs Out to add new filament and resume printing.
Automatic Filament Continuation: i7's toolhead is equipped with a filament break detection sensor. If the current filament runs out, i7 will automatically pause, allowing you to replace the filament and continue printing the unfinished model. When used with the CFS lite, it can achieve automatic filament continuation.
Remove the empty spool from the spool holder.
Insert the new filament into the extruder.
Click "Extrude" and wait for the filament to flow out of the nozzle.
Click resume printing.