Page registered using `i3.new_page` doesn't work

[AFCMS]

Describe the bug

Tried the following code:

i3.new_tab("minify", {
    description = "Minify",
    image = "default_stone.png",

    access = function(player, data)
        return true
    end,

    formspec = function(player, data, fs)
        fs("label[3,1;This is just a test]")
        return fs
    end,

    fields = function(player, data, fields)

    end,
})

I get this by opening my inventory:

But then I click the "Minify" tab it does nothing.

Additional context

• Mod version: git
• Engine version: 5.6-dev
• LuaJIT enabled: Yes
• Operating system: Ubuntu 22.04
• Did you try to disable other mods except i3: no other mods except mine

[kilbith]

The fields function must return i3.set_fs(player)

[AFCMS]

Oh OK

[kilbith]

Or just remove the function fields if you don't need it.

[kilbith]

Also you don't need to add return fs in the formspec function.