How to reproduce:
1. Create a new Essential Pathways template project
2. Close the Tutorials window
3. Press 'Tutorials → Welcome Dialog' in the toolbar
4. Press the 'Start Mission 1' button
5. Observe the Console
Actual result: 'NullReferenceException' error is thrown
Expected result: Nothing is thrown in the Console
Reproducible in: 4.0.0, 5.0.2 (6000.0.65f1, 6000.3.4f1, 6000.4.0b4, 6000.5.0a4)
Not reproducible in: 3.1.3 (6000.0.65f1)
Reproduced on: Windows 11 Pro (25H2)
Not reproduced on: No other environment tested