It doesn't appear that Curse Client knows about the game version. I caught it a few weeks ago trying to update to the 3.0+ version of Dominos, and today I think it updated Mailbox Complete to the 3.0+ version. API changes mean 3.0+ versions of add-ons sometimes have problems running on the 2.4.x client.
It would be super awesome if Curse Client could check this first. And if this has already been discussed elsewhere then I apologise for the repetition.
Otherwise, love it so far. Looking forward to being able disembed.
Did you notice the field "Game Version" at the CC addons.
So if I prepare my addon to run with the PTR or beta I can share it at curse (or other sites) without a problem -- that's the reason for the "Game Version" field.
But CC ignores it - that's the problem.