Problems installing tidyverse

[mara]

@moomin

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun 

This xcrun error means you're missing Xcode Command Line Tools and need to install them (I know, super obvious, right? )

The TL;DR solution is to run:
xcode-select --install
from the command line/terminal, but if you want more info...

Here's another post where the same happened (and I've got links in there)

Problem with ggpubr

This means that you're missing Xcode Command Line Tools (I'm assuming you're on a Mac). Even though this post is for El Capitan, I know the same holds for Sierra (and I assume High Sierra, and Mojave, even, though you might want to search around a bit if you're on the last one).