Solution : https://service.sap.com/sap/support/notes/1374947 (SAP Service marketplace login required)
Key words :
00 sp20 patch level 1, 00 sp19 patch level 3, 01 sp5 patch level 1, 01 sp4 patch level 2, switch back, original desktop, change back, original theme, terms desktop, prerequisites prerequisites
Related Notes :
| 1422828 | SAP NW Portal Platform NW04s, SPs20 - Known Issues |
| 1373989 | SAP NetWeaver Portal Platform NW701, EhP1 SP5 |
| 1299552 | SAP NetWeaver Portal Platform NW701, EhP1 SP4 |
| 1278664 | Known Issues with Portal Platform in SAP NW7.0 SP19 |