Unable to add points to Two Handed Sword Strenghtener

[Unable to add points to Two Handed Sword Strenghtener]

It worked, thanks!

[Unable to add points to Two Handed Sword Strenghtener]

Hello,

 

I am trying to add points in the "Two Handed Sword Straightener", but cannot. The dialogue comes, I click OK to add point, but nothing happens.
I was able to add points to all the other skills.

I am also lv400, and have a Rune Blade (2handed) in my hands. 
I tried with and without the "Spiral Charge" buff. I also reset the master tree 2 times to see if that would help. Also restarted client and made sure all the updates were done. 

What else could I do? Is there a trick?

 

 

Thanks