"You have reached your daily limit for doc shares"

Yesterday I worked with several colleagues on a Coda doc. Each of them was completely new to Coda. And each of them had opened their account only a few hours earlier. Yet when they the first time tried to share a doc they received the following answer: “You have reached your daily limit for doc shares” (see attached picture). How is that possible, if you have not shared a single doc before. What should my colleagues do?