Matthew Schuelke

This is due to the NAMED -> reference counting change in R v4.0.0. The 15 copies example should also be changed. See my answer on [StackOverflow](https://stackoverflow.com/questions/61844416/example-in-advanced-r-of-modifying-a-list).

Hi @jschoeneberger, I get the same error when I try to run my example app using an install of gganimate from the master branch of thomasp85/gganimate. The example app above...