After the update to 10.2, slash in gives this error

SlashIn/SlashIn.lua:14: attempt to index upvalue 'MacroEditBox' (a nil value)

Possibly related to this?
https://us.forums.blizzard.com/en/wow/t/1666552/11

To address selective event registration the MacroEditBox was removed from the global namespace and the event was replaced with a callback.