Error(s) in re-building vignettes:
  ...
--- re-building 'STERGM.Rnw' using knitr
Loading required package: ergm
Loading required package: network
network: Classes for Relational Data
Version 1.16.1 created on 2020-10-06.
copyright (c) 2005, Carter T. Butts, University of California-Irvine
                    Mark S. Handcock, University of California -- Los Angeles
                    David R. Hunter, Penn State University
                    Martina Morris, University of Washington
                    Skye Bender-deMoll, University of Washington
 For citation information, type citation("network").
 Type help("network-package") to get started.


ergm: version 3.10.4, created on 2019-06-10
Copyright (c) 2019, Mark S. Handcock, University of California -- Los Angeles
                    David R. Hunter, Penn State University
                    Carter T. Butts, University of California -- Irvine
                    Steven M. Goodreau, University of Washington
                    Pavel N. Krivitsky, University of Wollongong
                    Martina Morris, University of Washington
                    with contributions from
                    Li Wang
                    Kirk Li, University of Washington
                    Skye Bender-deMoll, University of Washington
                    Chad Klumb
Based on "statnet" project software (statnet.org).
For license and citation information see statnet.org/attribution
or type citation("ergm").

NOTE: Versions before 3.6.1 had a bug in the
implementation of the bd() constriant which distorted
the sampled distribution somewhat. In addition,
Sampson's Monks datasets had mislabeled vertices. See
the NEWS and the documentation for more details.

NOTE: Some common term arguments pertaining to vertex
attribute and level selection have changed in 3.10.0.
See terms help for more details. Use
'options(ergm.term=list(version="3.9.4"))' to use old
behavior.

Loading required package: networkDynamic

networkDynamic: version 0.10.1, created on 2020-01-16
Copyright (c) 2020, Carter T. Butts, University of California -- Irvine
                    Ayn Leslie-Cook, University of Washington
                    Pavel N. Krivitsky, University of Wollongong
                    Skye Bender-deMoll, University of Washington
                    with contributions from
                    Zack Almquist, University of California -- Irvine
                    David R. Hunter, Penn State University
                    Li Wang
                    Kirk Li, University of Washington
                    Steven M. Goodreau, University of Washington
                    Jeffrey Horner
                    Martina Morris, University of Washington
Based on "statnet" project software (statnet.org).
For license and citation information see statnet.org/attribution
or type citation("networkDynamic").


tergm: version 3.6.1, created on 2019-06-12
Copyright (c) 2019, Pavel N. Krivitsky, University of Wollongong
                    Mark S. Handcock, University of California -- Los Angeles
                    with contributions from
                    David R. Hunter, Penn State University
                    Steven M. Goodreau, University of Washington
                    Martina Morris, University of Washington
                    Nicole Bohme Carnegie, New York University
                    Carter T. Butts, University of California -- Irvine
                    Ayn Leslie-Cook, University of Washington
                    Skye Bender-deMoll
                    Li Wang
                    Kirk Li, University of Washington
Based on "statnet" project software (statnet.org).
For license and citation information see statnet.org/attribution
or type citation("tergm").

Quitting from lines 326-334 (STERGM.Rnw) 
Error: processing vignette 'STERGM.Rnw' failed with diagnostics:
Unconstrained MCMC sampling did not mix at all. Optimization cannot continue.
--- failed re-building 'STERGM.Rnw'

SUMMARY: processing the following file failed:
  'STERGM.Rnw'

Error: Vignette re-building failed.
Execution halted