Refused to apply style from 'https://url/w/mw-config/?css=1' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.So I get a very great looking installer...
Visiting the url in question
[5be3d5e6960d7beba7ce3596] /w/mw-config/?css=1 Wikimedia\Services\ServiceDisabledException from line 415 of /var/www/wiki/w/includes/libs/services/ServiceContainer.php: Service disabled: DBLoadBalancer
Backtrace:
#0 /var/www/wiki/w/includes/MediaWikiServices.php(624): Wikimedia\Services\ServiceContainer->getService(string)
#1 /var/www/wiki/w/includes/ServiceWiring.php(828): MediaWiki\MediaWikiServices->getDBLoadBalancer()
#2 /var/www/wiki/w/includes/libs/services/ServiceContainer.php(451): Wikimedia\Services\ServiceContainer->{closure}(MediaWiki\MediaWikiServices)
#3 /var/www/wiki/w/includes/libs/services/ServiceContainer.php(419): Wikimedia\Services\ServiceContainer->createService(string)
#4 /var/www/wiki/w/includes/MediaWikiServices.php(1009): Wikimedia\Services\ServiceContainer->getService(string)
#5 /var/www/wiki/w/includes/installer/WebInstallerOutput.php(141): MediaWiki\MediaWikiServices->getResourceLoader()
#6 /var/www/wiki/w/includes/installer/WebInstaller.php(1241): WebInstallerOutput->getCSS()
#7 /var/www/wiki/w/includes/installer/WebInstaller.php(179): WebInstaller->outputCss()
#8 /var/www/wiki/w/mw-config/index.php(82): WebInstaller->execute(array)
#9 /var/www/wiki/w/mw-config/index.php(40): wfInstallerMain()
#10 {main}If we click one step further in the installer, I'd presume it's related to Could not find a suitable database driver! You need to install a database driver for PHP. The following database types are supported: MariaDB, MySQL, or compatible, PostgreSQL, SQLite. (I didn't have a db connector installed), which is fine, but it shouldn't result in a stack trace, and it shouldn't result in broken styles...
However, installing php7.3-sqlite and restarting nginx still results in the same error