The community had a fix that seemed to work for more people than what the dev's suggested. Just open your plot layouts and delete them. Don't worry, they rebuild. Some folks had to pick up the anchor and place it again. Some had to have the anchors sent to them by alt. I used this (deleting plot layouts) on both paid accounts which had anchors in guild halls and free accounts which did not have anchors in halls and it corrected the issue. So it is not limited to guild hall issue since it was happening on free accounts which cannot place items in guild halls.
Been there, done that and they still don't work. Just did that on my alt that it's broken on. Also, I notice my signature doesn't work anymore
Yeah, I came up with that, and it no longer works. Having another character mail it to my character, deleting all the layout files... anchors are 100% completely broken now.