You’d need more detail for this to be a bug report. Is this a standard install?
That’s not surprising, and not recommended.
I don’t see that error in Discourse source. Is this a recent version?
Did you run it something like this?
rake site_settings:import < settings.yml
Here’s what it looked like when I ran it and restored it on the same site:
root@monstera-stagingdashboard:/var/www/discourse# rake site_settings:export >/tmp/settings.yml
root@monstera-stagingdashboard:/var/www/discourse# rake site_settings:import </tmp/settings.yml
starting import...
Results:
Updated: 0
Not Found: 0
Errors: 0
I changed a few settings and ran it again and it worked.
I think that still works, though it’s harder to make work than the rake task is supposed to be.