Either you start the active directory
You can try to set these parameters that should allow non SSO/SNC access.
snc/accept_insecure_cpic =1
snc/accept_insecure_gui = 1
snc/accept_insecure_r3int_rfc =1
snc/accept_insecure_rfc = 1
snc/permit_insecure_start = 1
or you deactivate SSO by setting
snc/enable = 0
Regards