Cant create my SECOND rune...

Hi

(I posted this topic even in the support section bc idk which is the right one)

I reached lvl 15 and as every accounts i have 2 custom slots for runes. Reaching lvl 15 allows me to fully customize my runes since i unlocked everything ( first and second path)

So i created the first rune and its ok.

Then i clicked the "create new" button in order to customize the second one. I chose the "first path" but after that it seems i got a bugged window which shows all my runes ( preset+ the 1 customized before) with an "x" button on the top right. It seems like the pop-up for the rune creation is open but its kinda "invisible" exept for the "x" to close it.

I did a manual restoration of the client through the settings but nothing happened.

I also found other people with the same problem: https://boards.euw.leagueoflegends.com/en/c/bug-reports-eu/bYLutJ8m-cant-create-second-rune-page

Can someone help, please?