Error(s) in re-building vignettes:
  ...
--- re-building 'estudy2-intro.Rmd' using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette 'estudy2-intro.Rmd' failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building 'estudy2-intro.Rmd'

SUMMARY: processing the following file failed:
  'estudy2-intro.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘estudy2-intro.Rmd’ using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette ‘estudy2-intro.Rmd’ failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building ‘estudy2-intro.Rmd’

SUMMARY: processing the following file failed:
  ‘estudy2-intro.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building ‘estudy2-intro.Rmd’ using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette 'estudy2-intro.Rmd' failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building ‘estudy2-intro.Rmd’

SUMMARY: processing the following file failed:
  ‘estudy2-intro.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building ‘estudy2-intro.Rmd’ using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette 'estudy2-intro.Rmd' failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building ‘estudy2-intro.Rmd’

SUMMARY: processing the following file failed:
  ‘estudy2-intro.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'estudy2-intro.Rmd' using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette 'estudy2-intro.Rmd' failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building 'estudy2-intro.Rmd'

SUMMARY: processing the following file failed:
  'estudy2-intro.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘estudy2-intro.Rmd’ using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette ‘estudy2-intro.Rmd’ failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building ‘estudy2-intro.Rmd’

SUMMARY: processing the following file failed:
  ‘estudy2-intro.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
  ...
--- re-building ‘estudy2-intro.Rmd’ using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette ‘estudy2-intro.Rmd’ failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building ‘estudy2-intro.Rmd’

SUMMARY: processing the following file failed:
  ‘estudy2-intro.Rmd’

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'estudy2-intro.Rmd' using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette 'estudy2-intro.Rmd' failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building 'estudy2-intro.Rmd'

SUMMARY: processing the following file failed:
  'estudy2-intro.Rmd'

Error: Vignette re-building failed.
Execution halted
Error(s) in re-building vignettes:
--- re-building 'estudy2-intro.Rmd' using rmarkdown
Warning: FB download failed; trying again.
Quitting from lines 56-63 (estudy2-intro.Rmd) 
Error: processing vignette 'estudy2-intro.Rmd' failed with diagnostics:
Unable to import "FB".
FB download failed after two attempts. Error message:
HTTP error 404.
--- failed re-building 'estudy2-intro.Rmd'

SUMMARY: processing the following file failed:
  'estudy2-intro.Rmd'

Error: Vignette re-building failed.
Execution halted