I'm building a Survey123 in the online builder, and at first it would let me save just fine. But now when I try to save, it just gives me the error "the question has not question component."

The details say the same thing. It's really strange, and Google hasn't yielded any results. I don't want to simply refresh, because I most likely will lose all changes since the last save.
I'm on google Chrome Version 65.0.3325.181 (Official Build) (64-bit)
Has anyone seen this error before?
EDIT: I deleted the last two of my questions just fine (and that didn't fix anything) but it won't let me delete my third-to-last question. I'm assuming this is the issue.