We've been made aware of a bug with that occurs when editing your profile. It will not allow you to save it without entering content into certain fields.
We've added several questions to our registration process, which appear in your profile due to how the forum software handles registrations. These fields are not seen by anyone other than staff, and we welcome you to just enter random information into these fields as we don't require existing users to populate them with anything.
If you're still having issues with saving your profile, please raise the issue in the >Help & Support< forum.