3227226 - Error in Program CL_MDG_BS_ECC_ACCESS while activating the Change Request.

System throwing below errors in SLG1 while activating the Change Request in MDG. 

• Error in Program CL_MDG_BS_ECC_ACCESS==========CP, Include CL_MDG_BS_ECC_ACCESS==========CM00G, Line 1:
• An exception with the type CX_SY_REF_IS_INITIAL occurred, but was neither handled locally, nor declared in a RAISING clause
• Dereferencing of the NULL reference

SAP S/4HANA 2021

MDG CL_MDG_BS_ECC_ACCESS, CX_SY_REF_IS_INITIAL, Dereferencing, Null Reference. , KBA , CA-MDG-APP-BP , Business Partner (Central Parts) , Problem