@sampo2910 of None is the only option that works, then that's probably the only one your email provider supports. It should be fine as long as you don't need your emails to be perfectly secure.
@oplik0 that's entirely incorrect. git fetch does literally nothing to local files, and even if it did, ./nodebb upgrade only affects the database and files that aren't handled by git.
Oh, possible. It probably fixed things for me because my problems were mostly due to me messing with NodeBB files. It seemed to reset the upgrade then, but that probably was because it didn't get to actually changing anything while I broke it.
Would probably be preferable, since auto makes it behave like no z-index property has been specified (as is the case in the default Bootstrap theme used in lavender and persona) which makes the element inherit the z-index of its parent, whereas z-index: 0 forces the z-index to be, well, 0.