Hello,
I keep getting a sync error on the mobile app. I used the web app to link two books that were just added to the core and when I went to the mobile app, it wanted me to sync which I tried to, but it said it failed and to contact support. I tried removing the two books from my collection and re-adding them, but it’s still giving me the error.
I am sorry to hear you are having problems syncing with the CLZ Cloud.
It looks like you have been trying to sync while our server was having problems. This has caused a small discrepancy in the CLZ Cloud bookkeeping.
I have fixed this for you now. You should now be able to sync again.
Can you please let me know if that worked or not?
It worked. Thank you!
FASTEST SUPPORT EVER! 
Thanks for letting me know