RStudio cannot find make: 'make' is not recognized as an internal or external command, operable program or batch file.

Hi, and welcome!

Please see the FAQ: What's a reproducible example (`reprex`) and how do I do one? Using a reprex, complete with representative data will attract quicker and more answers. It's not needed for this question, but keep in mind for coding questions.

An error message like this nearly always means that either the program hasn't been installed, has been installed under a different name or, most often, it is not findable because it is not in the path of directories searched.

As it appears that the system is running under Windows, I can't help further, since it's been 15 years since I've worked in that environment