Error installing package

[lendijoy]

I am trying to install the OnyxR package and keep getting an error. I recently upgraded my version of R so I'm wondering if maybe my error has something to do with that.

Here is the code I enter:
source('https://raw.githubusercontent.com/brandmaier/onyxR/master/tools/install.R')

This is what I get in return.
Downloading git repo https://github.com/brandmaier/onyxR
Error: Failed to install 'unknown package' from Git:
setup stdio for 'C:/PROGRA1/R/R-401.2/bin/x64/Rcmd.exe' (system error 2, The system cannot find the file specified.

) @win/processx.c:976 (processx_exec)

[brandmaier]

Hi! Were you able to resolve this issue?

[haaglena]

Did you find a solution for this error message when installing onyxR?
If I use this code:

source('https://raw.githubusercontent.com/brandmaier/onyxR/master/tools/install.R')

I get this warning message and am not able to install the onyxR package:
Error: Failed to install 'unknown package' from Git:
Command failed (1)
In addition: Warning messages:
1: In system(full, intern = TRUE, ignore.stderr = quiet) :
running command ''/usr/bin/git' ls-remote https://github.com/brandmaier/onyxR 2>/dev/null' had status 1
2: In system(full, intern = TRUE, ignore.stderr = quiet) :
running command ''/usr/bin/git' ls-remote https://github.com/brandmaier/onyxR 2>/dev/null' had status 1

Does anybody know what the problem might be and how I am able to install onyxR?