Login Not Loading

I am not able to log into Usermin, the page will not load and then just goes to a blank page with no url.

This problem has just occurred today, I was able to access my emails this morning using login from the virtualmin domain user page but I can also not log into webmail.mydomain.name

It is not a theme problem as I tried using the new theme as well as the old one.

Any ideas

Many thanks

Still having the same problem…