As the title says, I'm getting an error when trying to run Lionheart saying it can't set the resolution then crashes. I've tried setting the resolution in compatibility mode as well as the widescreen path and neither seemed to work.

Has anyone else run into this issue?

Not sure if it will work. Have you tried installing the game in a folder other than C:\Program Files\? If not, try installing it in another folder, like C:\Games\. Also, run the game with Administrator privileges.

Check the very bottom of this link for details:

www.pcgamingwiki.com/wiki/Lionheart:_Legacy_of_the_Crusader