Can't login to https://www.accommodation-site.co.uk/

Hi there, I used all in one migration to bring in a site from a multisite that I was having problems with on siteground – I didn't bring in any plugins or themes, but as soon as I had done this I was unable to login to accommodation-site.co.uk. I then deleted it, but it still won't let me login. Can you please see if you can see what the problem is? Many thanks, Ellen