Cannot upgrade nor create gems

Hi,

Somehow in Act 1 cruel, I can't upgrade gems, at least to lvl12.
Yes I picked gemling legionnaire, however I didn't allocate Adaptive capability.
Have the requirements satisfied for some, the thing is it won't let me create a single lvl12 gem (all greyed out).



Could use some help or advice in case I'm doing something wrong.

Thank you in advance.

Ok, somehow I'm able to upgrade skills once more.