When attempting to enter profile name, error appears saying name too short

When attempting to purchase Minecraft Java, the purchase form asks me to enter a profile name.  I entered IHATEDucks, but an error appeared when I started typing requiring at least 3 chars in the name.  This error did not disappear when the length exceeded 3 characters and after payment information was entered, clicking the purchase button did nothing.  I tried on multiple devices using both the latest versions of Chrome and Edge.