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Fehler in download.file(paste(ifelse(secure, "https", "http"), "://s3.amazonaws.com/rstudio-dictionaries/",  :

cannot download all files

Zusätzlich: Warnmeldung:

In download.file(paste(ifelse(secure, "https", "http"), "://s3.amazonaws.com/rstudio-dictionaries/",  :

URL 'https://s3.amazonaws.com/rstudio-dictionaries/all-dictionaries.zip': status was 'SSL connect error'

算了。