I tried to install tscR per the instructions but get this error when I try to load it:

> require(tscR)
Loading required package: tscR
Loading required package: dplyr

Attaching package: ‘dplyr’

The following objects are masked from ‘package:stats’:

    filter, lag

The following objects are masked from ‘package:base’:

    intersect, setdiff, setequal, union

Error in dyn.load(dynlib <- getDynlib(dir)) : 
  unable to load shared object '/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rgl/libs/rgl.so':
  dlopen(/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rgl/libs/rgl.so, 6): Library not loaded: /opt/X11/lib/libGLU.1.dylib
  Referenced from: /Library/Frameworks/R.framework/Versions/4.0/Resources/library/rgl/libs/rgl.so
  Reason: image not found
Error: package or namespace load failed for ‘tscR’:
 .onLoad failed in loadNamespace() for 'rgl', details:
  call: rgl.init(initValue, onlyNULL)
  error: OpenGL is not available in this build
Warning messages:
1:  Loading rgl's DLL failed. 
    This build of rgl depends on XQuartz, which failed to load.
 See the discussion in https://stackoverflow.com/a/66127391/2554330 
2: Trying without OpenGL... 

Any assistance would be much appreciated!