Error in re-building vignettes:
  ...

Getting holdings for SP500
Getting data...

Warning in download.file(url, destfile = tmp, quiet = TRUE) :
  InternetOpenUrl failed: 'Der Servername oder die Serveradresse konnte nicht verarbeitet werden.'
Warning: x = 'AAPL', get = 'key.stats': Error in download.file(url, destfile = tmp, quiet = TRUE): cannot open URL 'http://download.finance.yahoo.com/d/quotes.csv?s=AAPL&f=aa2a5bb4b6c1c4dd1ee7e8e9f6ghjj1j2j4j5j6kk3k4k5ll1mm3m4m5m6m7m8nopp2p5p6qrr1r5r6r7s6s7t8vwxy&e=.csv'

Warning in download.file(url, destfile = tmp, quiet = TRUE) :
  InternetOpenUrl failed: 'Der Servername oder die Serveradresse konnte nicht verarbeitet werden.'
Warning: x = 'AAPL', get = 'key.stats': Error in download.file(url, destfile = tmp, quiet = TRUE): cannot open URL 'http://download.finance.yahoo.com/d/quotes.csv?s=AAPL&f=aa2a5bb4b6c1c4dd1ee7e8e9f6ghjj1j2j4j5j6kk3k4k5ll1mm3m4m5m6m7m8nopp2p5p6qrr1r5r6r7s6s7t8vwxy&e=.csv'
 Removing AAPL.
Warning in download.file(url, destfile = tmp, quiet = TRUE) :
  InternetOpenUrl failed: 'Der Servername oder die Serveradresse konnte nicht verarbeitet werden.'
Warning: x = 'FB', get = 'key.stats': Error in download.file(url, destfile = tmp, quiet = TRUE): cannot open URL 'http://download.finance.yahoo.com/d/quotes.csv?s=FB&f=aa2a5bb4b6c1c4dd1ee7e8e9f6ghjj1j2j4j5j6kk3k4k5ll1mm3m4m5m6m7m8nopp2p5p6qrr1r5r6r7s6s7t8vwxy&e=.csv'
 Removing FB.
Warning in download.file(url, destfile = tmp, quiet = TRUE) :
  InternetOpenUrl failed: 'Der Servername oder die Serveradresse konnte nicht verarbeitet werden.'
Warning: x = 'GOOG', get = 'key.stats': Error in download.file(url, destfile = tmp, quiet = TRUE): cannot open URL 'http://download.finance.yahoo.com/d/quotes.csv?s=GOOG&f=aa2a5bb4b6c1c4dd1ee7e8e9f6ghjj1j2j4j5j6kk3k4k5ll1mm3m4m5m6m7m8nopp2p5p6qrr1r5r6r7s6s7t8vwxy&e=.csv'
 Removing GOOG.
Warning in value[[3L]](cond) : Returning as nested data frame.
Quitting from lines 211-214 (TQ01-core-functions-in-tidyquant.Rmd) 
Error: processing vignette 'TQ01-core-functions-in-tidyquant.Rmd' failed with diagnostics:
object 'Ask' not found
Execution halted