Basically there are now two addresses for this site:
Unfortunately, the way the system works, you can only be logged into one.
I have migrated most (if not all links) to https://mvertigo.org
So please check which URL you are using in your browser address bar and remove the www.
Log into that and all should be dandy.
The www version is only still accessible so people don’t think the site has gone or they are locked out.