When run on MediaWiki 1.26, the extension generates a warning:
Warning: OutputPage::getModuleStyles: style module should define its position explicitly: ext.semanticforms.wikieditor ResourceLoaderFileModule [Called from OutputPage::getModuleStyles in /srv/data/www/root/w/includes/OutputPage.php at line 621] in /srv/data/www/root/w/includes/debug/MWDebug.php on line 300