Just a bug. And bugs could be fixed.
This guide is your definitive 2021-specific crash fix checklist. We will move from the most common (easy) fixes to the most technical (registry edits). hoi4 millennium dawn crash fix 2021
Disable problematic features in MD
Fixing persistent crashes in the Millennium Dawn mod for Hearts of Iron IV in 2021 often involves addressing engine limitations, mod conflicts, or specific game data errors that trigger on fixed dates. Just a bug