I have been unable to update my R.utils package. The package downloads correctly and appears to compile things correctly, but then it fails with the following message:
Error: package or namespace load failed for 'R.utils':
object 'extract' not found whilst loading namespace 'R.utils'
Running R 3.5.1 on Windows 10, RStudio is up to date.
Any suggestions as to what this error means and how to fix it? Many thanks in advance for any help.