I have moved the patch folder contents (For Steamdesk, The Labyrinth, text files) over like normal. I even checked the folder for the provoke.png and it's still there but the ability itself seemed to stop working after the updating. Did some further testing and my counters/provokes are being ignored, the ability goes off, text appears for Trap Sword but the icon doesn't pop up nor does the buff get applied. I tried harmonic defender on Lolita Knight and it randomizes which allies guard themselves. The ability visually glows blue on all allies but it doesn't seem to work.
The bug I'm mostly dealing with is that buffs that you can apply to teammates can "miss"
Question, is it possible to downgrade to 1.6.3? I started playing in this version of the game. Would like to see if it's a version issue.
I was able to figure out what I think was going on for you. The current patch (1.6.5) should solve it (I am thinking there was an attack missed flag that wasn't being cleared on a bunch of your characters making it so status effects couldn't be applied). If it is not fixed, please email me your save (email is in the ChangeLog) so I can take a look at it.
And yeah, if you ever run into anything that is broken in a current version that wasn't in a previous, you can always roll back and the issue should fix itself in most cases. In the case of your issue, it was something that would have started on 1.6.4.