So I decide to run the php update.php - as it suggest there was a problem with the schema...
That produced this output...
bitnami@debian:~/apps/mediawiki/htdocs/maintenance$ php update.php
MediaWiki 1.30.0 Updater
Your composer.lock file is up to date with current dependencies!
Going to run database updates for vmug-wiki
Depending on the size of your database this may take a while!
Abort with control-c in the next five seconds (skip this countdown with --quick) ... 0
Turning off Content Handler DB fields for this part of upgrade.
...ipblocks table does not exist, skipping new field patch.
...ipblocks table does not exist, skipping new field patch.
Creating interwiki table ...done.
Adding default interwiki definitions ...[ce881387246825dfc7e40a28] [no req] Wikimedia\Rdbms\DBQueryError from line 1149 of /opt/bitnami/apps/mediawiki/htdocs/includes/libs/rdbms/database/Database.php: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading?
Query: REPLACE INTO `interwiki` (iw_prefix,iw_url,iw_local,iw_api) VALUES
('acronym','http://www.acronymfinder.com/~/search/af.aspx?string=exact&Acronym=$1',0,''),
('advogato','http://www.advogato.org/$1',0,''),
('arxiv','http://www.arxiv.org/abs/$1',0,''),
('c2find','http://c2.com/cgi/wiki?FindPage&value=$1',0,''),
('cache','http://www.google.com/search?q=cache:$1',0,''),
('commons','https://commons.wikimedia.org/wiki/$1',0,'https://commons.wikimedia.org/w/api.php'),
('dictionary','http://www.dict.org/bin/Dict?Database=*&Form=Dict1&Strategy=*&Query=$1',0,''),
('doi','http://dx.doi.org/$1',0,''),
('drumcorpswiki','http://www.drumcorpswiki.com/$1',0,'http://drumcorpswiki.com/api.php'),
('dwjwiki','http://www.suberic.net/cgi-bin/dwj/wiki.cgi?$1',0,''),
('elibre','http://enciclopedia.us.es/index.php/$1',0,'http://enciclopedia.us.es/api.php'),
('emacswiki','http://www.emacswiki.org/cgi-bin/wiki.pl?$1',0,''),
('foldoc','http://foldoc.org/?$1',0,''),
('foxwiki','http://fox.wikis.com/wc.dll?Wiki~$1',0,''),
('freebsdman','http://www.FreeBSD.org/cgi/man.cgi?apropos=1&query=$1',0,''),
('gentoo-wiki','http://gentoo-wiki.com/$1',0,''),
('google','http://www.google.com/search?q=$1',0,''),
('googlegroups','http://groups.google.com/groups?q=$1',0,''),
('hammondwiki','http://www.dairiki.org/HammondWiki/$1',0,''),
('hrwiki','http://www.hrwiki.org/wiki/$1',0,'http://www.hrwiki.org/w/api.php'),
('imdb','http://www.imdb.com/find?q=$1&tt=on',0,''),
('kmwiki','http://kmwiki.wikispaces.com/$1',0,''),
('linuxwiki','http://linuxwiki.de/$1',0,''),
('lojban','http://www.lojban.org/tiki/tiki-index.php?page=$1',0,''),
('lqwiki','http://wiki.linuxquestions.org/wiki/$1',0,''),
('meatball','http://www.usemod.com/cgi-bin/mb.pl?$1',0,''),
('mediawikiwiki','https://www.mediawiki.org/wiki/$1',0,'https://www.mediawiki.org/w/api.php'),
('memoryalpha','http://en.memory-alpha.org/wiki/$1',0,'http://en.memory-alpha.org/api.php'),
('metawiki','http://sunir.org/apps/meta.pl?$1',0,''),
('metawikimedia','https://meta.wikimedia.org/wiki/$1',0,'https://meta.wikimedia.org/w/api.php'),
('mozillawiki','http://wiki.mozilla.org/$1',0,'https://wiki.mozilla.org/api.php'),
('mw','https://www.mediawiki.org/wiki/$1',0,'https://www.mediawiki.org/w/api.php'),
('oeis','http://oeis.org/$1',0,''),
('openwiki','http://openwiki.com/ow.asp?$1',0,''),
('pmid', 'https://www.ncbi.nlm.nih.gov/pubmed/$1?dopt=Abstract',0,''),
('pythoninfo','http://wiki.python.org/moin/$1',0,''),
('rfc','https://tools.ietf.org/html/rfc$1',0,''),
('s23wiki','http://s23.org/wiki/$1',0,'http://s23.org/w/api.php'),
('seattlewireless','http://seattlewireless.net/$1',0,''),
('senseislibrary','http://senseis.xmp.net/?$1',0,''),
('shoutwiki','http://www.shoutwiki.com/wiki/$1',0,'http://www.shoutwiki.com/w/api.php'),
('squeak','http://wiki.squeak.org/squeak/$1',0,''),
('tmbw','http://www.tmbw.net/wiki/$1',0,'http://tmbw.net/wiki/api.php'),
('tmnet','http://www.technomanifestos.net/?$1',0,''),
('theopedia','http://www.theopedia.com/$1',0,''),
('twiki','http://twiki.org/cgi-bin/view/$1',0,''),
('uncyclopedia','http://en.uncyclopedia.co/wiki/$1',0,'http://en.uncyclopedia.co/w/api.php'),
('unreal','http://wiki.beyondunreal.com/$1',0,'http://wiki.beyondunreal.com/w/api.php'),
('usemod','http://www.usemod.com/cgi-bin/wiki.pl?$1',0,''),
('wiki','http://c2.com/cgi/wiki?$1',0,''),
('wikia','http://www.wikia.com/wiki/$1',0,''),
('wikibooks','https://en.wikibooks.org/wiki/$1',0,'https://en.wikibooks.org/w/api.php'),
('wikidata','https://www.wikidata.org/wiki/$1',0,'https://www.wikidata.org/w/api.php'),
('wikif1','http://www.wikif1.org/$1',0,''),
('wikihow','http://www.wikihow.com/$1',0,'http://www.wikihow.com/api.php'),
('wikinfo','http://wikinfo.co/English/index.php/$1',0,''),
('wikimedia','https://wikimediafoundation.org/wiki/$1',0,'https://wikimediafoundation.org/w/api.php'),
('wikinews','https://en.wikinews.org/wiki/$1',0,'https://en.wikinews.org/w/api.php'),
('wikipedia','https://en.wikipedia.org/wiki/$1',0,'https://en.wikipedia.org/w/api.php'),
('wikiquote','https://en.wikiquote.org/wiki/$1',0,'https://en.wikiquote.org/w/api.php'),
('wikisource','https://wikisource.org/wiki/$1',0,'https://wikisource.org/w/api.php'),
('wikispecies','https://species.wikimedia.org/wiki/$1',0,'https://species.wikimedia.org/w/api.php'),
('wikiversity','https://en.wikiversity.org/wiki/$1',0,'https://en.wikiversity.org/w/api.php'),
('wikivoyage','https://en.wikivoyage.org/wiki/$1',0,'https://en.wikivoyage.org/w/api.php'),
('wikt','https://en.wiktionary.org/wiki/$1',0,'https://en.wiktionary.org/w/api.php'),
('wiktionary','https://en.wiktionary.org/wiki/$1',0,'https://en.wiktionary.org/w/api.php')
Function: Wikimedia\Rdbms\Database::sourceFile( /opt/bitnami/apps/mediawiki/htdocs/maintenance/interwiki.sql )
Error: 1054 Unknown column 'iw_api' in 'field list' (localhost:3306)
Backtrace:
#0 /opt/bitnami/apps/mediawiki/htdocs/includes/libs/rdbms/database/Database.php(979): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#1 /opt/bitnami/apps/mediawiki/htdocs/includes/libs/rdbms/database/Database.php(3325): Wikimedia\Rdbms\Database->query(string, string)
#2 /opt/bitnami/apps/mediawiki/htdocs/includes/libs/rdbms/database/Database.php(3274): Wikimedia\Rdbms\Database->sourceStream(unknown type, NULL, NULL, string, NULL)
#3 /opt/bitnami/apps/mediawiki/htdocs/includes/installer/DatabaseUpdater.php(673): Wikimedia\Rdbms\Database->sourceFile(string)
#4 /opt/bitnami/apps/mediawiki/htdocs/includes/installer/MysqlUpdater.php(406): DatabaseUpdater->applyPatch(string, boolean, string)
#5 /opt/bitnami/apps/mediawiki/htdocs/includes/installer/DatabaseUpdater.php(472): MysqlUpdater->doInterwikiUpdate()
#6 /opt/bitnami/apps/mediawiki/htdocs/includes/installer/DatabaseUpdater.php(436): DatabaseUpdater->runUpdates(array, boolean)
#7 /opt/bitnami/apps/mediawiki/htdocs/maintenance/update.php(204): DatabaseUpdater->doUpdates(array)
#8 /opt/bitnami/apps/mediawiki/htdocs/maintenance/doMaintenance.php(92): UpdateMediaWiki->execute()
#9 /opt/bitnami/apps/mediawiki/htdocs/maintenance/update.php(249): require_once(string)
#10 {main}
