Every time I click the wardrobe button from the personal tab I get a page saying 404 not found. I tried opening the wardrobe in a new tab and that worked. I'm using Opera and I'm logged into the new site. I don't get the 404 issue on the legacy site.
I just tried going to the wardrobe, the way that you did, and I didn't get this error. Are you still getting it?
Can you try clearing your browser's cache, and then see if you keep getting it? That tends to fix a lot of issues, so trying that may fix it.