"Your Vikunja account will be deleted tomorrow" -- forever

[kolaente]

Does your user have a default project?

In that case, check out

Can´t delete user

Well you get the error because your user has a default project set. This is already fixed but not yet released as a version, only in unstable builds. You can unset the default project in the user settings and should be able to remove the user then. The other option would be to switch to the unstable build.

And Delete user account doesn't work · Issue #83 · go-vikunja/api · GitHub