Herald of Thunder Bug

I am currently experiencing a bug involving the “Herald of Thunder” buff. I am a Brazilian player.

For some reason, the game indicates that the issue is related to my current weapon set; however, I only have a single weapon equipped — a Spear — as I am playing the Huntress class.

I am not certain what caused this issue. I simply deactivated the buff once, and since then I have been unable to reactivate it.

Okay, for some reason the game wasn’t taking my arsenal into account, but I figured out that you can set that passive buff to activate with a specific arsenal. Sorry for the dumb mistake — the first time I didn’t have to do that, I just right-clicked and it activated without any problem.