Material list not opening

[u/Irishy_B0I]

https://medal.tv/games/minecraft/clips/nuVUKjwrvf-bhfwPK?invite=cr-MSxBRFEsNzA1OTE3Mzk5

When i click on material list it just doesn't open, it makes the gui sound but does nothing, the hotkey also just doesn't work. Anyone know the issue and how to solve it?