Inventory

[granite eagle]

I’m trying to make it so my inventory only appears when i click play and it’s not doing that, and also when i join my sever it doesn’t want my custom inventory to appear.

[swift steppe]

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[nova patrol]

Your inventory looks to be custom. I'm not sure what your code says but you should (pseudocode here):
On "Play" button click:
Move custom inventory to user GUI
custom inventory.enable = true

Normally, to hide it, you can just use .enabled or .visible, or you can remove it from the UserGUI parent and put it elsewhere.