Shiny App: 2-level design gives NaN% Power

[psycaroly]

Dear Kristoffer,

I tried out the shiny app right now, but when I select a 2-level design a power of NaN% is shown (with default values, but also when changing the values).

The 3-level design works.

R shows the following warnings:
Warning in qt(1 - alpha/2, df = df) : NaNs wurden erzeugt
Warning in qt(alpha/2, df = df) : NaNs wurden erzeugt

I'm using powerlmm version 0.4.0.

Best,
Caroline