Has this issue been resolved? Since the update I have not been able to add songs. I am stuck at 99. I have cleared the cache and history etc. I am logged in, but when I got to search a song and add it, I has me logged out and I have to log in. At that point I’m starting over and the same problem continues to happen. I am using an iPad and MacBook.
I am a new member and was having the exact same problem. I was logged in, then when I tried to add a song to my songbook, it reckoned I was logged out and it just took me to the forum page without any resolution.
Whoever put up the post about the CC cleaner, THANK YOU! It solved my problem and can now add songs to my songbook 
I'm really enjoying the site, just what I needed to get an easy access practice list together so I don't have to keep looking up every song individually