Error(s) in re-building vignettes:
  ...
--- re-building ‘GSoC-2017_additions.Rmd’ using rmarkdown
Package:  markovchain
Version:  0.6.9.14
Date:     2019-01-20
BugReport: http://github.com/spedygiorgio/markovchain/issues

--- finished re-building ‘GSoC-2017_additions.Rmd’

--- re-building ‘an_introduction_to_markovchain_package.Rmd’ using rmarkdown
Package:  markovchain
Version:  0.6.9.14
Date:     2019-01-20
BugReport: http://github.com/spedygiorgio/markovchain/issues

! Undefined control sequence.
l.14 \Plainauthor
                 {Giorgio Alfredo Spedicato, Tae Seung Kang, Sai Bhargav Yal...

Error: processing vignette 'an_introduction_to_markovchain_package.Rmd' failed with diagnostics:
Failed to compile an_introduction_to_markovchain_package.tex. See https://yihui.name/tinytex/r/#debugging for debugging tips. See an_introduction_to_markovchain_package.log for more info.
--- failed re-building ‘an_introduction_to_markovchain_package.Rmd’

--- re-building ‘complicateSteadyStates.Rmd’ using rmarkdown
Package:  markovchain
Version:  0.6.9.14
Date:     2019-01-20
BugReport: http://github.com/spedygiorgio/markovchain/issues

--- finished re-building ‘complicateSteadyStates.Rmd’

--- re-building ‘higher_order_markov_chains.Rmd’ using rmarkdown
Loading required package: markovchain
Package:  markovchain
Version:  0.6.9.14
Date:     2019-01-20
BugReport: http://github.com/spedygiorgio/markovchain/issues

This function is experimental
! Undefined control sequence.
l.14 \Plainauthor
                 {Deepak Yadav, Tae Seung Kang, Giorgio Alfredo Spedicato} 

Error: processing vignette 'higher_order_markov_chains.Rmd' failed with diagnostics:
Failed to compile higher_order_markov_chains.tex. See https://yihui.name/tinytex/r/#debugging for debugging tips. See higher_order_markov_chains.log for more info.
--- failed re-building ‘higher_order_markov_chains.Rmd’

--- re-building ‘markovchainCrashIntro.Rmd’ using rmarkdown
--- finished re-building ‘markovchainCrashIntro.Rmd’

SUMMARY: processing the following files failed:
  ‘an_introduction_to_markovchain_package.Rmd’
  ‘higher_order_markov_chains.Rmd’

Error: Vignette re-building failed.
Execution halted