Description of problem:
I upgraded from f27 to f28 and the useradd command starts emitting strange error messages.

Version-Release number of selected component (if applicable):
shadow-utils-4.6-4.fc28.x86_64

How reproducible:
Always

Steps to Reproduce:
1. useradd test
2.
3.

Actual results:
(Thu Dec 20 14:01:13:717694 2018) [sss_cache] [confdb_get_domains] (0x0010): No domains configured, fatal error!
Could not open available domains
useradd: sss_cache exited with status 2
useradd: Failed to flush the sssd cache.
(Thu Dec 20 14:01:13:737678 2018) [sss_cache] [confdb_get_domains] (0x0010): No domains configured, fatal error!
Could not open available domains
useradd: sss_cache exited with status 2
useradd: Failed to flush the sssd cache.


Expected results:
No error message

Additional info:
Luckily the user was added despite the error message.