FreeBSD web build failed on build-web.ysv.freebsd.org

[User Www-data]

Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1/htdocs/snapshots
===> support
Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1/htdocs/support
===> doc
Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1
===> doc/articles (all)
Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1/articles
===> doc/articles/bsdl-gpl (all)
Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1/articles/bsdl-gpl
===> doc/articles/building-products (all)
Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1/articles/building-products
===> doc/articles/committers-guide (all)
Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1/articles/committers-guide
===> doc/articles/contributing (all)
Warning: Object directory not changed from original /usr/local/www/build/head/en_US.ISO8859-1/articles/contributing
===> doc/articles/contributors (all)
env XML_CATALOG_FILES="file:///usr/local/www/build/head/en_US.ISO8859-1/articles/contributors/catalog-cwd.xml  file:///usr/local/www/build/head/en_US.ISO8859-1/share/xml/catalog.xml  file:///usr/local/www/build/head/share/xml/catalog.xml  file:///usr/local/share/xml/catalog" /usr/local/bin/xmllint --nonet --noent --valid --dropdtd --xinclude /usr/local/www/build/head/en_US.ISO8859-1/articles/contributors/article.xml > article.parsed.xml.tmp
/usr/local/www/build/head/en_US.ISO8859-1/articles/contributors/contrib.develalumni.xml:19: parser error : Entity 'a.jvf.email' not defined
    <para>&a.jvf.email; (2006 - 2017)</para>
                       ^
/usr/local/www/build/head/en_US.ISO8859-1/articles/contributors/contrib.develalumni.xml:1450: parser error : chunk is not well balanced

^
/usr/local/www/build/head/en_US.ISO8859-1/articles/contributors/article.xml:394: parser error : Failure to process entity contrib.develalumni
    &contrib.develalumni;
                         ^
/usr/local/www/build/head/en_US.ISO8859-1/articles/contributors/article.xml:394: parser error : Entity 'contrib.develalumni' not defined
    &contrib.develalumni;
                         ^
*** Error code 1

Stop.
make[4]: stopped in /usr/local/www/build/head/en_US.ISO8859-1/articles/contributors
*** Error code 1

Stop.
make[3]: stopped in /usr/local/www/build/head/en_US.ISO8859-1/articles
*** Error code 1

Stop.
make[2]: stopped in /usr/local/www/build/head/en_US.ISO8859-1
*** Error code 1

Stop.
make[1]: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs/doc
*** Error code 1

Stop.
make: stopped in /usr/local/www/build/head/en_US.ISO8859-1/htdocs
        3.79 real         1.47 user         2.45 sys