Chris wrote:
Please don't delete everything. Nothing needs to be deleted to start fixing this, and removing the library would take away films and shows that SparkBox cannot get back. I also need to correct the earlier answer. Settings → Tools → Run cleanup removes every app image no container is using, including the older versions of your apps that SparkBox keeps so you can roll back. After it runs, rolling back to those versions is no longer possible. The lighter option, Remove unused image layers, only removes dangling images and leaves those older versions alone. The earlier answer left that out, and I'm sorry for it. SparkBox's assistant now has that cleanup detail corrected, so it won't give the same advice to the next person. Before you remove anything, tell me what is actually broken: the app name and the message you see on screen.