In screenshots on your website, it appears that boards can also be top-level and need not have a board group as a parent. However, when I try to create a board without a group, I get the error that the board group title must have at least 2 characters.
Besides, also in the Add Board popup, the autocorrect proposals when entering a board group name contain the entry “null”, which results in an empty string when clicked, which is still not accepted as it is less then 2 characters. Please fix. Thank you 🙂