I used R-hub builder to build and check a package. It used to work as expected in the past. I am now getting an error when building the vignette:
Error in loadNamespace(name) : there is no package called 'utf8' Calls: <Anonymous> ... loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart Execution halted
This only shows up on the Windows build, so it's not a universal dependency. What is the proper approach to deal with this?