DMx Manager Error 'No users with SPECIALIST level have been registered'

When DMx Manager is launched, a series of error messages are shown. The
error message, “No users with SPECIALIST level have been registered. You must
enter such a user (Name and Password) before continuing” [Figure 1] is
displayed first, followed by a series of other error messages.

 

Figure 1. Initial error message

After pressing OK on the initial error message, another error message appears.
Selecting continue application brings up the normal dialog box,
however when attempting to Add a specialist level user, the previous error
message shown in Figure 2 is displayed again. This article provides steps to
resolve the issue.

Figure 2. “An error occurred in the application.”