Makie - Weird error with Observables

Sorry, I thought the code above was clear enough to guess the rest of the variables.
Here is the state of my packages:

(@v1.6) pkg> st GLMakie
      Status `~\.julia\environments\v1.6\Project.toml`
  [e9467ef8] GLMakie v0.1.27

(@v1.6) pkg> st Colors
      Status `~\.julia\environments\v1.6\Project.toml`
  [5ae59095] Colors v0.12.6

And here is a full MWE:

Summary
# Load packages
using GLMakie, Colors

# Data
freqs = range(5e8, 4.5e10, length = 1001);
lr = range(0.01, 2π, length = 1001);
S = Array{Complex,3}(undef, 1001, 3, 25);
for i = 1:25
    S[:,1,i] = @. (50 - 50*exp(im*lr*i/12))/(50 + 50*exp(im*lr*i/12))
    S[:,2,i] = @. (50 - 75*exp(im*lr*i/12))/(50 + 75*exp(im*lr*i/12))
    S[:,3,i] = @. (50 - 35*exp(im*lr*i/12))/(50 + 35*exp(im*lr*i/12))
end


# Figure
titles = ["S₁₁","S₁₂","S₂₂"]
res = (1920*0.9, 1080*0.5) # Pixel size
fig = Figure(resolution = res)
for i = 1:3
    fig[1,i] = Axis(fig,
    title = titles[i],
    xminorticksvisible = true,
    yminorticksvisible = true,
    xminorgridvisible = true,
    yminorgridvisible = true,
    xminorticks = IntervalsBetween(4),
    yminorticks = IntervalsBetween(4),
    xlabel = "f [GHz]",
    ylabel = "dB")
end
linkaxes!(contents(fig[1,1])[1], contents(fig[1,2])[1], contents(fig[1,3])[1])
ylims!(contents(fig[1,1])[1], (-50, 0))
fig[0,:] = Label(fig, "Default title", textsize = 30)


# Interactivity
fig[3,:] = Slider(fig, range = 1:25, startvalue = 1)
p = contents(fig[3,:])[1].value
toggle = Toggle(fig, active = true)

# Create labels (static)
lin_label = Label(fig, "lin")
dB_label = Label(fig, "dB")

# Display labels and toggle
fig[2,4] = grid!(hcat(lin_label,toggle,dB_label), tellheight = false)

# Try to plot figures
labels = ["CST","CST","CST"]
colores = [RGB(0.85, 0.325, 0.098), RGB(0, 0.447, 0.741)]
indices = [CartesianIndex(1,1),CartesianIndex(1,2),CartesianIndex(2,2)]
dB = x -> (20*log10(abs(x)))
for i in 1:3
        lines!(fig[2,i], 
            freqs, 
            dB.(S[:,i,1]),
            label = labels[i],
            ylabel = "dB",
            color = colores)
    end