Re: The page you were looking for was not found.
Make sure that you moved the themes, not copied them over. Having them in 2 places can make things go silly.
Also, you say that you activated the plugins and then moved your themes around. Go to the bp settings, use the profile theme selector, select the bp member’s theme and then save it. Don’t just save it if it’s already there. Use the pull down menu and choose it again & save it.
This probably won’t fix the issue but it’s worth a shot. I know sometimes my installations get a little wonky with profiles if I do it out of order.