MediaWiki 1.26.2 PHP 5.6 I'm getting this error
Warning: OutputPage::getModuleStyles: style module should define its position explicitly: ext.Lingo.Styles ResourceLoaderFileModule [Called from OutputPage::getModuleStyles in /app/mediawiki/mw/includes/OutputPage.php at line 623] in /app/mediawiki/mw/includes/debug/MWDebug.php on line 300
I was getting a sumular error with extension bootstrap and found this https://phabricator.wikimedia.org/rEBOO21a2c420b91b06b780e146a678cda808d1086...
Thanks for your help! Phil