Thanks, yes I contacted them this morning and they told me that they are aware of the problem and are in the process of fixing. Thanks for your help. Hopefully they will provide a speedy resolution!
I’m with Austdomains. I also forgot to mention that I have also tried clearing cookies and cache, no luck. Austdomains host another website for me, and I haven’t yet tried to update WordPress on it. The admin page for that site works fine.