Watch out: there's a fatal bug in develop triggered in block 284193 with the error message: 'assert asset != 'BTC' # Never BTC.'. I just pushed a hotfix to GitHub.
I got the error on the master branch. It still doesn't work for me with the latest github.
Yeah, mine does the same as well.
When I do a
"git pull origin master"
I get an update saying 'Already upto date'.
Maybe that is probably why.
If not technically inclined, just wait it out a few days.