Dear Experts,
we just upgraded our BI Java from SP8 tp SP12 using SUM successfully, and currently we are on trying to set up SAP Fiori.
We suddenly have an issue after logoff and logon to java screen main menu and got nothing in the main menu screen except LOGOFF menu.
Everytime we logon to the java instance using http://<servername>:50400/irj/portal then we got the empty screen as you can see the attahced file.
We do not have any issue with the NWA screen using http:<servername>:50400/nwa 
after logging on the screen got empty as you can see below:
we do not have issue with NWA screen:
I have no idea what had happened with the screen since we did not 'do anything' regarding the screen.
Please advise.
Regards,
Rudi