Installatioj fails

[ThomasWolf0701]

I tried to install ngsflows both on Windows and Linux and get the following error message:
Object 'CPU' not found

The downloaded binary packages are in
C:\Users\Thomas Wolf\AppData\Local\Temp\Rtmpg7PBcn\downloaded_packages
√ checking for file 'C:\Users\Thomas Wolf\AppData\Local\Temp\Rtmpg7PBcn\remotes85c681f34cc\flow-r-ngsflows-ba41551/DESCRIPTION' (392ms)

• preparing 'ngsflows': (394ms)
  √ checking DESCRIPTION meta-information ...
• checking for LF line-endings in source and make files and shell scripts
• checking for empty or unneeded directories
• building 'ngsflows_0.3.12.tar.gz'

Installing package into ‘C:/Users/Thomas Wolf/Documents/R/win-library/4.0’
(as ‘lib’ is unspecified)

• installing source package 'ngsflows' ...
  ** using staged installation
  ** R
  ** inst
  ** byte-compile and prepare package for lazy loading
  Warnmeldungen:
  1: Paket 'flowr' wurde unter R Version 4.0.5 erstellt
  2: Paket 'params' wurde unter R Version 4.0.5 erstellt
  Error in eval(parse(text = text, keep.source = FALSE), envir) :
  Objekt 'CPU' nicht gefunden
  Fehler: unable to load R code in package 'ngsflows'
  Ausführung angehalten
  ERROR: lazy loading failed for package 'ngsflows'
• removing 'C:/Users/Thomas Wolf/Documents/R/win-library/4.0/ngsflows'
  Warnmeldung:
  In i.p(...) :
  installation of package ‘C:/Users/THOMAS~1/AppData/Local/Temp/Rtmpg7PBcn/file85c15cd53c2/ngsflows_0.3.12.tar.gz’ had non-zero exit status