Hard to say based on that stack trace, errors in the unifiedInvocationHandler tend to be compatibility issues.

Seeing this thread late, I really like the idea here and have found LL to be flawed. My gripe is that many of the first round battles are 1 unit vs 1 unit, the luck in those battles then dictate the course of the rest of the game. That always felt really painful to me as you spend the rest of the game fighting a lost war due to luck at the beginning, and post-round1, the larger army LL mechanics make the battles predictable.

I'd likely prefer this variant of LL over LL.

I hacked in a feature called "unit chooser" that cycled through available units. A problem encountered was a bug in the game where the hotkey focus was lost and you'd have to click on the map to re-activate it.

I'll be MIA for about 6 weeks, when I get back there are one or two projects to work on, I hope I can dig that work out, polish it off and perhaps get it added. Next release is going to be 2.0, with luck this will then be in 2.1, the following release.