Now I'm having this bug, too T_T
I was enjoying the game, in fact, it's awesome. But I'm also having all kinds of bugs.
Glad to hear there's something to look forward to at the end of this. I still haven't been able to get past the very first RTS battle in the campaign.
Same.
Are you invading that territory 2 steps to the east? It's possible it's map related.
I had been, though I just did some testing, and it happens elsewhere as well. However, it may somehow be map related. I instead attacked west, and for the first two maps, I didn't run into this issue (the territory immediately west, and then the northern of the 2 territories past that). When I attacked the southern of those 2 territories, I again had the error message.
A couple of things that might have been different between those maps:
The first two maps were very small and very fast, the enemy base was nearby my own, and I was able to overwhelm it with just my strategic troops. I did still build a few additional troops and go into dragon mode, to see if any of that affected it, but it seemed fine. In other words, my total play time in these maps was short and the units on screen were few (though I was still on each map for longer than it took me to get the error message on the eastern map).
The third map was more similar to the eastern map, larger with intermediate control points between you and the enemy. Here I didn't immediately send my strategic forces in, and instead built up. I'm not sure what exactly I was doing when the error message came up, but it certainly wasn't actual combat (either queueing troops or looking at control points, etc.).
Not sure if that's just coincidence, but I can say that it doesn't happen on every map every time.