Hi,
Please refer to this blog SAP Fiori LL20 - Role and Authorization settings for SAP Fiori launchpad and accordingly add authorizations as given for end users in the front end and back end systems.
Front end server:
Z_SAP_UI2_USER_700 (Role)
R3TR IWSG ZINTEROP_0001 (Menu Authorization default)
R3TR IWSG ZPAGE_BUILDER_PERS_0001 (Menu Authorization default)
/IWFND/RT_GW_USER (Authorization Template)
S_PB_CHIP(Authorization Object)
/UI2/CHIP (Authorization Object)
S_SERVICE (Authorization Object)
App specific Catalog role
App specific Group role
Back end server:
/IWBEP/RT_MGW_USR (Authorization template)
S_RFCACL (Authorization Object)
App specific OData role
Regards,
Saurabh