Error(s) in re-building vignettes:
--- re-building ‘bhav.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
trying URL 'https://archives.nseindia.com/content/historical/EQUITIES/2021/JUL/cm01JUL2021bhav.csv.zip'
Quitting from lines 23-27 (bhav.Rmd) 
Error: processing vignette 'bhav.Rmd' failed with diagnostics:
cannot open URL 'https://archives.nseindia.com/content/historical/EQUITIES/2021/JUL/cm01JUL2021bhav.csv.zip'
--- failed re-building ‘bhav.Rmd’

--- re-building ‘bhavpr.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
trying URL 'https://archives.nseindia.com/archives/equities/bhavcopy/pr/PR010721.zip'
Content type 'application/zip' length 330905 bytes (323 KB)
==================================================
downloaded 323 KB

--- finished re-building ‘bhavpr.Rmd’

--- re-building ‘bhavtoday.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘bhavtoday.Rmd’

--- re-building ‘fobhav.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
trying URL 'https://archives.nseindia.com/content/historical/DERIVATIVES/2021/JUL/fo01JUL2021bhav.csv.zip'
Quitting from lines 23-26 (fobhav.Rmd) 
Error: processing vignette 'fobhav.Rmd' failed with diagnostics:
cannot open URL 'https://archives.nseindia.com/content/historical/DERIVATIVES/2021/JUL/fo01JUL2021bhav.csv.zip'
--- failed re-building ‘fobhav.Rmd’

--- re-building ‘fobhavtoday.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
--- finished re-building ‘fobhavtoday.Rmd’

SUMMARY: processing the following files failed:
  ‘bhav.Rmd’ ‘fobhav.Rmd’

Error: Vignette re-building failed.
Execution halted