On further investigation this is only happening when trying to save Yu Jing, or ISS lists. Every other faction is working fine.
Yeah it's a Yu Jing problem. One of the players at my tournament this weekend is also experiencing this issue, and I tried it myself a few times. My ISS list saved, so perhaps it's certain units?
I've tried alot of ISS lists haven't gotten any to work so far. @HellLois is CB aware of this problem?
It's broken for me also. I've been seeing a lot of this lady: Could be JSA hackers trying to disrupt ISS activity... or just a bug in army.
I have the same problem saving Vanilla YJ lists to my ITS account. It does not matter if I use the webclient or the mobile app. I even tested to remove all JSA profiles, the error keeps coming. I guess it has something to do with the reorganisation of troops from JSA, but its quite annoying if you can't save your ideas for tournament lists.
As @Zoe told, we're updating server code, so try again in a few hours. If you're still getting any error, please post it. We're sorry about inconvenience. Thanks for your patience.