ToME: the Tales of Maj'Eyal

I have played this game since 2015. I bought the Ashes of Urh'Rok DLC a while back on steam and it worked fine. I recently got back into Maj'eyal and bought the Embers of Rage DLC to try out the new Tinker classes. I thought Sawbutcher and Gunslinger is automatically unlock upon purchase but it seems to be lock. Is it a glitch or I have to do something in game to unlock it? Thanks!

Change the Campaign to Embers of Rage.

Once you reach a specific point in the EoR campaign with two different EoR classes, these will become playable in the Age of Ascendancy campaign as well.

Wow! I knew it was something very simple and dumb. Thanks!