Error(s) in re-building vignettes:
  ...
--- re-building ‘Canopy_vignettes.Rnw’ using Sweave
Loading required package: ape
Loading required package: fields
Loading required package: spam
Loading required package: dotCall64
Loading required package: grid
Spam version 2.2-2 (2019-03-07) is loaded.
Type 'help( Spam)' or 'demo( spam)' for a short introduction 
and overview of this package.
Help for individual functions is also obtained by adding the
suffix '.spam' to the function name, e.g. 'help( chol.spam)'.

Attaching package: ‘spam’

The following objects are masked from ‘package:base’:

    backsolve, forwardsolve

Loading required package: maps
See https://github.com/NCAR/Fields for
 an extensive vignette, other supplements and source code 
Loading required package: pheatmap
Loading required package: scatterplot3d
Error: processing vignette 'Canopy_vignettes.Rnw' failed with diagnostics:
Running ‘texi2dvi’ on ‘Canopy_vignettes.tex’ failed.
LaTeX errors:
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! LaTeX Error: Unknown float option `H'.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
--- failed re-building ‘Canopy_vignettes.Rnw’

SUMMARY: processing the following file failed:
  ‘Canopy_vignettes.Rnw’

Error: Vignette re-building failed.
Execution halted