Bug colossal capacity

Hello,
I play warrior in Titan ascendency and I switch my ascendency points from Mysterious lineage to colossal capacity, then add my two other points after the second ascendency trial to get Hulking form. I could have swith by I can't acces to my 20 invetory slot even I have the button.
I tried to refund all my ascendency points, I can remove my first two points (hulking form and 4 % strength) but I can't remove colossal capacity.

I Same issue no fix known?

Same here. Got the skill on my char but cant access the box. Playing on PS5