Unhandled Exception has occurred – When creating a new message in DXFC 3.3.0

When creating a new message using Dsign Xpress FC (DXFC) you receive an error:

Unhandled Exception has occurred…  –  Click on Details you may have the following error.
System.NullReferenceException: Object reference not set to an instance of an object.

This is normally caused due to the Font selection is blank when trying to add new text.

Before typing the new text, click on the drop down and select a font.

The normal font that is used is the EDS Regular font.

Then type the new text, then save.

You may need to select the font from the dropdown every time you create a new message.