b5 didn’t make a difference for me, so activated debug…
WordPress database error: [Unknown column ‘wp_posts.ID’ in ‘on clause’]
Sounds like “wp_” was assumed to be the default prefix even though it’s not the case on my wordpress instance…
I have the same issue, but as I chosed HTML messages I think you need to add <br /> beacons to make HTML message to display a linebreak…