The downtime happens by mistake on my part - I tested to run the song updates again and seem to work and went outside, then some hours later it went down. I am now trying to fix it again - sorry for the downtime!
Fixed the downtime, It was because of heavy load on the song database and Redis server. I will optimize it until then I will slow down the song updates a bit, which mean it can miss some songs. That will go to normal as soon as it has been fixed.