Hello!
For some reason, addon complains about a perfectly legitimate macro: https://i.imgur.com/3MTTtTL.jpeg

The macro itself is:

#showtooltip
/startattack
/cast [nomod, known:117014] Elemental Blast
/cast [nomod, noknown:117014] Lightning Bolt
/cast [mod:shift] Lightning Bolt

it's because the macro validation code can't properly handle the spaces before known, removing that, will fix the error
I don't think this is something that'll be fixed anytime soon, unless some other dev volunteers some time to fix up that (rather messy) code 🙂