3785576 - WDA:Runtime error 'OBJECTS_OBJREF_NOT_ASSIGNED' occurred when accessing UI configuration settings

When accessing UI configuration settings across multiple WDA applications like Specification & Recipe App, Portfolio Item App, My change request App getting below error:

500 internal server error Access using a 'ZERO' object reference is not possible 

ST22 Dump:

Category               ABAP programming error

Runtime Errors         OBJECTS_OBJREF_NOT_ASSIGNED

ABAP: Program          CL_WDR_P13N_RT================CP

Application Component   BC-WD-ABA

Short Text:

Access using a 'ZERO' object reference is not possible.

The termination occurred in ABAP program or include                                       

"CL_WDR_P13N_RT================CP", in "DECORATORS_FILL_DEC_NODE".                                                                                          

In the source code, the termination point is in line                  

"CL_WDR_P13N_RT================CM045".                                                      

include "CL_WDR_P13N_RT================CM045".

>>>>>l_pp13n_node_struc-view_name = l_decorator_for->view->name.

• SAP NetWeaver
• SAP NetWeaver Application Server for SAP S/4HANA
• ABAP PLATFORM - Application Server ABAP
• SAP Web Dynpro 
• UIDP SAPK-1001INUIDP to SAPK-10007INUIDP
• UIMABAC  SAPK-100 to SAPK-10002INUIMABAC
• GRCUIDP 100 

OBJECTS_OBJREF_NOT_ASSIGNED, CL_WDR_P13N_RT, DECORATORS_FILL_DEC_NODE, l_pp13n_node_struc-view_name, l_decorator_for->view->name, Access using a 'ZERO' object reference is not possible, UI Data Protection Masking, WDA Blocking. , KBA , BC-WD-ABA , Web Dynpro ABAP , GRC-UDS-DO , UI Data Obfuscation Masking , Problem