launch_shinystan error message

[willizhang]

When I tried to use launch_shinystan to reproduce a plot (Figure 4) from shinystan in the paper User-friendly Bayesian regression modeling: A tutorial with rstanarm and shinystan, an error message appeared:

"project "ggplot_fns.rda" has no activate script and so cannot be activated"

This is the code I used:

SingleLevelModel <- stan_glm(valence ~ arousal, data = dat)
launch_shinystan(SingleLevelModel)

I have searched Google and the Stan Forum, and I haven't seen this error been reported. So, I am reporting it here, and hope to get some help. Many thanks in advance!