Tell him to redownload the beatmap, if he hasn't yet. He may need to get an updated version of the .osb .
You usually save it the regular method. Just make sure the images in the Storyboard are there the whole time (Like you have the fade set to 1 (solid) throughout whatever)
You usually save it the regular method. Just make sure the images in the Storyboard are there the whole time (Like you have the fade set to 1 (solid) throughout whatever)
