3510098 - "500 Internal Server Error" "Dereferencing of the NULL reference" error when using the Group Data Analysis or Group Data Analysis with Reporting Rules apps

When you open the Group Data Analysis (App ID: W0135) or the Group Data Analysis with Reporting Rules (App ID: W0136) apps you get an "500 Internal Server Error" "Exception CX_SY_REF_IS_INITIAL occurred because of error: Dereferencing of the NULL reference (Message E WEBDYNPRO_RT 007)" error message in your Fiori Launchpad.

In transaction ST22 you get a related dump as well, that looks like the following:

Category                        ABAP programming error
Runtime Errors               OBJECTS_OBJREF_NOT_ASSIGNED
Except.                          CX_SY_REF_IS_INITIAL
ABAP Program                CL_FPM_BICS_GRID_UIBB_RENDER==CP
Application Component    BW-RUI-FPM

SAP S/4HANA Finance for Group Reporting

CX_SY_REF_IS_INITIAL, 500 Internal Server Error, Dereferencing of the NULL reference, WEBDYNPRO_RT 007, Group Reporting, Group Data Analysis, Group Data analysis with Reporting Rules, W0135, W0136, OBJECTS_OBJREF_NOT_ASSIGNED, CL_FPM_BICS_GRID_UIBB_RENDER==CP , KBA , FIN-CS-EA , Embedded Analytics for S/4Hana Finance for Group Reporting , BW-RUI-FPM , FPM Analytical GUIBB , Known Error