Error(s) in re-building vignettes:
--- re-building ‘blockmodeling.Rmd’ using rmarkdown

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'blockmodeling.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘blockmodeling.Rmd’

--- re-building ‘centrality.Rmd’ using rmarkdown

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'centrality.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘centrality.Rmd’

--- re-building ‘complex_matrices.Rmd’ using rmarkdown

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'complex_matrices.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘complex_matrices.Rmd’

--- re-building ‘signed_2mode.Rmd’ using rmarkdown

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'signed_2mode.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘signed_2mode.Rmd’

--- re-building ‘signed_networks.Rmd’ using rmarkdown

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'signed_networks.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘signed_networks.Rmd’

--- re-building ‘structural_balance.Rmd’ using rmarkdown

Attaching package: 'igraph'

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

    decompose, spectrum

The following object is masked from 'package:base':

    union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'structural_balance.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘structural_balance.Rmd’

SUMMARY: processing the following files failed:
  ‘blockmodeling.Rmd’ ‘centrality.Rmd’ ‘complex_matrices.Rmd’
  ‘signed_2mode.Rmd’ ‘signed_networks.Rmd’ ‘structural_balance.Rmd’

Error: Vignette re-building failed.
Execution halted