You are editing an email list in NetCommunity. When clicking the view messages tab in the list editor, you may see a server/runtime error returned. Other email lists may allow you to view the messages in the editor without error.
We are currently evaluating this issue and will update this article when we have more information. In the meantime, the message details can be viewed under Email > Messages.
Steps to Duplicate
Log into the NetCommunity site.
Select Email > Lists.
Click the search tab > filter by data source of Individuals.
Click the pencil icon to edit the list.
In the list editor, select the view messages tab and note a runtime error is returned.