Chromium shows
This page isn’t working
localhost is currently unable to handle this request.
HTTP ERROR 500
for my web address
localhost/mediawiki-1.30.0
If this is due to the following problem
.../maintenance$ sudo php update.php
MediaWiki 1.30.0 Updater
Your composer.lock file is up to date with current dependencies!
[c90b2a4f2934cc501496e5ca] [no req] InvalidArgumentException from line 378 of /var/www/html/mediawiki-1.30.0/includes/libs/rdbms/database/Database.php: Wikimedia\Rdbms\Database::factory no viable database extension found for type 'mysql'
Backtrace:
#0 /var/www/html/mediawiki-1.30.0/includes/libs/rdbms/loadbalancer/LoadBalancer.php(985): Wikimedia\Rdbms\Database::factory(string, array)
#1 /var/www/html/mediawiki-1.30.0/includes/libs/rdbms/loadbalancer/LoadBalancer.php(801): Wikimedia\Rdbms\LoadBalancer->reallyOpenConnection(array, boolean)
#2 /var/www/html/mediawiki-1.30.0/includes/libs/rdbms/loadbalancer/LoadBalancer.php(667): Wikimedia\Rdbms\LoadBalancer->openConnection(integer, boolean, integer)
#3 /var/www/html/mediawiki-1.30.0/includes/GlobalFunctions.php(2858): Wikimedia\Rdbms\LoadBalancer->getConnection(integer, array, boolean)
#4 /var/www/html/mediawiki-1.30.0/maintenance/Maintenance.php(1253): wfGetDB(integer, array, boolean)
#5 /var/www/html/mediawiki-1.30.0/maintenance/update.php(146): Maintenance->getDB(integer)
#6 /var/www/html/mediawiki-1.30.0/maintenance/doMaintenance.php(92): UpdateMediaWiki->execute()
#7 /var/www/html/mediawiki-1.30.0/maintenance/update.php(249): require_once(string)
#8 {main}
.../maintenance$
What can I do to fix it?
My mediawiki database was created with 1.28.1.
I am running Ubuntu 17.10.