Undeclared package ‘future’ in Rd xrefs
Error(s) in re-building vignettes:
--- re-building ‘rsi.Rmd’ using rmarkdown

Quitting from lines 41-48 [unnamed-chunk-3] (rsi.Rmd)
Error: processing vignette 'rsi.Rmd' failed with diagnostics:
HTTP content type response 'text/plain' not defined for this operation.
--- failed re-building ‘rsi.Rmd’

SUMMARY: processing the following file failed:
  ‘rsi.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'rsi.Rmd' using rmarkdown

Quitting from lines 64-67 [unnamed-chunk-5] (rsi.Rmd)
Error: processing vignette 'rsi.Rmd' failed with diagnostics:
HTTP content type response 'text/plain' not defined for this operation.
--- failed re-building 'rsi.Rmd'

SUMMARY: processing the following file failed:
  'rsi.Rmd'

Error: Vignette re-building failed.
Execution halted