The System Has Encountered an Error HTTP Code: 500 APNX-1-0000-000

Greetings All,

I am not seeing this error when I search the community so I am asking for help here.

I created a CDT from a table called Trip.  Now I am trying to create a User Interface as a Read-Only Grid.  I am prompted to select the data source and I select Record Type.  I type in the name of the CDT and I see it as an option.  When I select it, I get the error as shown in the subject line.  Below is a screenshot of the error.  Any help will be appreciated.  Best, Paul