Hello all,
if you get error 404 for /sap/hba/* requests, it is solved by configuring routing in WebDispatcher like below and starting launchpad with your WebDispatcher server+port:
wdisp/system_0 = SID=EJQ, MSHOST=yoursap.domain.com, MSPORT=8101, SRCURL=/sap/bc;/sap/ui2;/sap/ushell;/sap/public;/sap/opu
wdisp/system_2= SID=EXT, XSSRV=http://yourhana.domain.com:8000, SRCURL=/sap/hba;/sap/hana
if you get 403 (forbidden) you must assign roles like sap.hba.r.sb.core.roles::SAP_SMART_BUSINESS*.
Regards
Markus