I can see my Transaction Analytics data, but get an error when I click a record

[#1]

Loading Transaction Analytics Flow map throws "Server Encountered an internal error" message

Affects Controller version 4.2

Problem

An application Agent pushes Transaction Analytics data to the Events Service. Though the user is able to see Transaction Analytics data in Analytics, when they double-click a Transaction Analytics record, an error pops-up:

The server encountered an internal error () that prevented it from fulfilling this request

Diagnosis

This error indicates that, though the user trying to access the Analytics record has Analytics permissions, they don't have permissions on the application to which this record belongs.

To load the  BT flow map, a user requires read permissions to that application. 

Solution

Provide the user with a role that includes Read access to the application. Once this permission is granted, the user should be able to see that BT flow map when loading the Transaction Analytics record: