In Spectrum 23.3.11, a problem was identified where users with email address configured as username are no more able to log in in Oneclick console/webapp.
The creation of these users are successful, but the login is not.
This is also valid for LDAP users.
Spectrum 23.3.11 and higher
The solution will be included in a next spectrum version (tentatively Spectrum 23.3.13).
For Spectrum 23.3.11 users, please contact the Broadcom Support Team and ask for the Spectrum_23.03.11.D281 patch.