Skill stopped working

Anyone know why I can't use galvanic shards anymore? It's happened before where I levelled up the skill and I didnt realise my attributes didn't meet minimum requirements until it clicked. Buffed my strength and that fixed it. This time I upgraded again and the skill now isn't in the bind menu so I legit can't use it, and yes, my attributes are high enough.

What am I missing?

Thanks!