Solution : https://service.sap.com/sap/support/notes/363061 (SAP Service marketplace login required)
Key words :
additional key words snc, system displays message, symptom sinc, patch level 758, work anymore, status bar, logon screen, single sign-, patch level >= 758, patch level >= 777
Related Notes :
| 177895 | Refitting the mySAP.com Single Sign-On capability |