Error with error code ERROR: 37D88C while accessing Customer permissions from the Project Settings

[Sriram Krishnamoorthi]

While accessing the Customer permissions page from the Project Settings, i see the "Something's gone wrong" with error code ERROR: 37D88C 

For a newly created project we do not have this error and could access the customer permissions page.

Also, while accessing Customer notifications page from Project Settings, i get the error "This project cannot be accessible" for the same project which was throwing the error as mentioned above. But the newly created project is good while accessing customer notifications.