If I edit Version Infomation (What's New in This Version) and try to save, an error will occur.
This problem has occurred in all Apps of "Ready For Sale" or "Pending Developer Release".
I changed the browser (Safari, Chrome), but I could not avoid this problem.
Another Mac, another account (Apple ID) was the same.
I contacted "App Store Developer Support" but I have no reply.
Does anyone have an idea to solve it soon?