Yeah, I had the same problem tonight. I’m hosted on BlueDomino as well. I found a fix, though. Follow the instructions on http://www.tamba2.org.uk/wordpress/site-url/ (using mysqladmin on BlueDomino control panel instead of myphpadmin… same thing, really). Yet, make the urls https:… As in https://www.tabma2.org.uk/T2
That worked for my login at least. Good luck.