VCSA 5.5b - SSO Identity Sources - 'alias' value should not be empty

I managed to add my VCSA to a Windows Server 2012 Domain, but when I tried to add the domain as an identity source, the VCSA seemed to accept this, but now I cannot manage my identity sources. I keep getting the error 'alias' value should not be empty.

I managed to find a way to manage the sources via cli for VCSA 5.1 , using the rsautil command , but I cannot find a similar command for VCSA 5.5

can any one help ?