You have configured SPNego for JAVA system but it is not allowing you to login to NetWeaver Administrator ( http[s]://<AS Java FQDN>:<port>/nwa ); no error is returned and only a blank screen is visible.
You are looking to disable SPNego to login via username and password.
SPNego Single Sign On Netweaver Portal SSO AS JAVA SSO , KBA , SV-LGN , Authentication Incidents , BC-JAS-SEC-LGN , Logon, SSO , Problem
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