Error(s) in re-building vignettes:
  ...
--- re-building 'stplanr-od.Rmd' using rmarkdown

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Could not fetch https://geocompr.robinlovelace.net/figures/desire-1.png
HttpExceptionRequest Request {
  host                 = "geocompr.robinlovelace.net"
  port                 = 443
  secure               = True
  requestHeaders       = []
  path                 = "/figures/desire-1.png"
  queryString          = ""
  method               = "GET"
  proxy                = Nothing
  rawBody              = False
  redirectCount        = 10
  responseTimeout      = ResponseTimeoutDefault
  requestVersion       = HTTP/1.1
}
 (InternalException (HandshakeFailed (Error_Misc "Network.Socket.recvBuf: resource vanished (Connection reset by peer)")))
Error: processing vignette 'stplanr-od.Rmd' failed with diagnostics:
pandoc document conversion failed with error 61
--- failed re-building 'stplanr-od.Rmd'

--- re-building 'stplanr-paper.Rmd' using rmarkdown
--- finished re-building 'stplanr-paper.Rmd'

--- re-building 'stplanr-route-nets.Rmd' using rmarkdown
Linking to GEOS 3.8.0, GDAL 2.4.3, PROJ 6.3.0
2020-01-13 03:11:28 constructing segments
2020-01-13 03:11:28 building geometry
2020-01-13 03:11:28 simplifying geometry
2020-01-13 03:11:28 aggregating flows
2020-01-13 03:11:28 rejoining segments into linestrings
--- finished re-building 'stplanr-route-nets.Rmd'

--- re-building 'stplanr-routing.Rmd' using rmarkdown
--- finished re-building 'stplanr-routing.Rmd'

--- re-building 'stplanr.Rmd' using rmarkdown
proj_create: init=epsg:/init=IGNF: syntax not supported in non-PROJ4 emulation mode
proj_create: init=epsg:/init=IGNF: syntax not supported in non-PROJ4 emulation mode
--- finished re-building 'stplanr.Rmd'

SUMMARY: processing the following file failed:
  'stplanr-od.Rmd'

Error: Vignette re-building failed.
Execution halted