2623194 - Missing Buttons on Fiori Launchpad Designer

• Weird display of the Fiori Launchpad after providing the logon details. For example, non centered tiles.
• Missing buttons on Fiori Launchpad Designer (FLPD) while adding a tile. For example, overlapped buttons or target mapping missing.
• Unable to open user parameter setting on fiori launchpad 
• Unable to revert the theme 

SAP Web Application Server for SAP S/4HANA

weird rendered Fiori launchpad page,  missing buttons on Fiori Launhpad designer, Fiori Launchpad UI rendered unusable, the launchpad designer (/ui2/flpd_cust) does not show all buttons, Fiori Launchpad shows UI error, SU01, /UI2/USER_PROFILE, SPERS_OBJ,Unable to revert the theme, unable to modify the theme, sap-theme=sap_belize, revert the theme via User Preference, BAE_MEXTRO , KBA , CA-UI2-INT-FE , SAP Fiori Launchpad services (Java Script) , Problem