Error on Windows: output path is parsed wrongly

[vertesy]

setup_MarkdownReports(OutDir = OutDir, scriptname = "Visualize.Gene.expression.v2.R")
[1] "All files will be saved under 'OutDir': ~/Downloads/scAnalysis/"
[1] "MarkdownReport location is stored in 'path_of_report': ~/Downloads/scAnalysis/Visualize.Gene.expression.v2.R.log.md"
Error in file(file, ifelse(append, "a", "w")) :
cannot open the connection
In addition: Warning message:
In file(file, ifelse(append, "a", "w")) :
cannot open file 'C:/Users/camilla.bosone/Documents/Downloads/scAnalysis/Visualize.Gene.expression.v2.R.log.md': No such file or directory