introspecting a working schema I found the tool raised these errors that we've never had problems with before: key names aren't allowed to have hyphens or dots or dollar signs.
We don't use dollar signs in our key names, but it raised an issue because somehow there were a bunch of types that I can't explain called IA_Dashboard, IA_Function, IA_Team, IA_UserPrototype, IA_UserSettings, and IA_UserStyles.
Our schema doesn't have any of those types, but somehow they appear in this tool AND they block the build schema button because they have dollar signs, leaving me confused and unsure how to proceed.