My guildmaster is encountering this bug. For what it’s worth, I’m not.
The requirement to use Wargare troops only for this weekend’s Invasion event is, for some reason, carrying over into Guild War defense team set ups.
She has also been one of those players plagued by Guild War defense teams resetting themselves, and so she has a tendency to set individual defense teams throughout the week, rather than just setting everything on Mondays.
Is anyone else encountering this error?