SAP BPC Model Deletion Error

Hi,

When we are deleting a Model from Environment in BPC Admin.

Getting the error as below

Dereferencing of the NULL reference

An exception of type 'CX_SY_REF_IS_INITIAL' occurred, that was not caught anywhere in the call hierarchy. It was not handled locally or declared using a RAISING clause.

After getting this error, All Models in the environment are not working and when i try to check the models in BPC Admin, below error appears.

Thanks.