Technical issues and problems with WoGa.

By the way, I had a glitch in the forester's hut...

I have the same glitch. But I get around it like this: I enter the forester's hut with reasonably strong forces, with the "Battle Mode Selection" script already enabled, and I set auto-battle. The computer fights without any losses, I receive the reward, and the error doesn't occur! This is when auto-battle can be useful...

And how does this bug manifest itself? In what cases?

When the hero's level is higher than 8-10, and with the "Advanced Hero Specializations" script. It appears at least in my case on a random map 1 out of approximately 10 times!
By the way, regarding my glitch, I found a screenshot where Lacus is level 16, and his Water element has a 165 bonus to attack and 138 to defense. Their health also increases by 60%...