Error(s) in re-building vignettes:
--- re-building 'an_introduction_to_markovchain_package.Rmd' using rmarkdown
Package:  markovchain
Version:  0.8.6
Date:     2021-05-17
BugReport: https://github.com/spedygiorgio/markovchain/issues

Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: Reference `fig:mcPlot' on page 8 undefined on input line 486.
Warning: LaTeX Warning: Reference `fig:mcPlotdiagram' on page 8 undefined on input line 
Warning: 486.
Warning: LaTeX Warning: Reference `fig:fromAndTo' on page 9 undefined on input line 519.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: Reference `fig:mcMathematics' on page 15 undefined on input line
Warning:  931.
Warning: LaTeX Warning: `h' float specifier changed to `ht'.
Warning: LaTeX Warning: Reference `fig:mobility' on page 40 undefined on input line 2516
Warning: .
Warning: LaTeX Warning: There were undefined references.
--- finished re-building 'an_introduction_to_markovchain_package.Rmd'

--- re-building 'gsoc_2017_additions.Rmd' using rmarkdown
--- finished re-building 'gsoc_2017_additions.Rmd'

--- re-building 'higher_order_markov_chains.Rmd' using rmarkdown
This function is experimental
! Missing \endcsname inserted.
<to be read again> 
                   \T1\textless 
l.9 ...r\000m\000\040\000=\000\040\0002\000\051}{}
                                                  % 9 

Error: processing vignette 'higher_order_markov_chains.Rmd' failed with diagnostics:
LaTeX failed to compile C:/r_packages/pkgcheck/CRAN/markovchain/markovchain.Rcheck/vign_test/markovchain/vignettes/higher_order_markov_chains.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips. See higher_order_markov_chains.log for more info.
--- failed re-building 'higher_order_markov_chains.Rmd'

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

Error: Vignette re-building failed.
Execution halted