[Frenzie]

It's a bit unclear what you mean by "this". If you mean that's an excerpt, I'd have to try at home. If you mean that's all you put in there, it's incomplete and should look closer to:

return {
    ["fontmap"] = {
        ["cfont"] = "IBMPlexSans-Regular.ttf",
        ["tfont"] = "IBMPlexSans-Bold.ttf",
        ["smalltfont"] = "IBMPlexSans-Bold.ttf",
        ["x_smalltfont"] = "IBMPlexSans-Bold.ttf",
        ["ffont"] = "IBMPlexSans-Regular.ttf",
        ["smallffont"] = "IBMPlexSans-Regular.ttf",
        ["largeffont"] = "IBMPlexSans-Regular.ttf",
        ["rifont"] = "IBMPlexSans-Regular.ttf",
        ["pgfont"] = "IBMPlexSans-Regular.ttf",
        ["scfont"] = "IBMPlexMono.ttf",
        ["hpkfont"] = "IBMPlexMono.ttf",
        ["hfont"] = "IBMPlexSans-Regular.ttf",
        ["infont"] = "IBMPlexMono.ttf",
        ["smallinfont"] = "IBMPlexMono.ttf",
        ["infofont"] = "IBMPlexSans-Regular.ttf",
        ["smallinfofont"] = "IBMPlexSans-Regular.ttf",
        ["smallinfofontbold"] = "IBMPlexSans-Bold.ttf",
        ["x_smallinfofont"] = "IBMPlexSans-Regular.ttf",
        ["xx_smallinfofont"] = "IBMPlexSans-Regular.ttf",
    },
}