When I try to save a css file, I get following error:
[2a9066e3ada1b0687cfa9e27] /w/index.php?title=Mall:Blank_head_empty/styles.css&action=submit Error from line 76 of /var/www/html/extensions/TemplateStyles/includes/TemplateStylesContent.php: Class 'Wikimedia\CSS\Parser\Parser' not found
Backtrace:
#0 /var/www/html/extensions/TemplateStyles/includes/TemplateStylesContent.php(131): TemplateStylesContent->sanitize(array)
#1 /var/www/html/includes/page/WikiPage.php(2129): TemplateStylesContent->getParserOutput(Title, NULL, ParserOptions)
#2 /var/www/html/extensions/TemplateData/includes/TemplateDataHooks.php(90): WikiPage->prepareContentForEdit(TemplateStylesContent, NULL, User, string)
#3 /var/www/html/includes/Hooks.php(177): TemplateDataHooks::onPageContentSave(WikiPage, User, TemplateStylesContent, string, integer, NULL, NULL, integer, Status)
#4 /var/www/html/includes/Hooks.php(205): Hooks::callHook(string, array, array, NULL)
#5 /var/www/html/includes/page/WikiPage.php(1618): Hooks::run(string, array)
#6 /var/www/html/includes/EditPage.php(2214): WikiPage->doEditContent(TemplateStylesContent, string, integer, boolean, User, string, array, integer)
#7 /var/www/html/includes/EditPage.php(1506): EditPage->internalAttemptSave(array, boolean)
#8 /var/www/html/includes/EditPage.php(652): EditPage->attemptSave(array)
#9 /var/www/html/includes/actions/EditAction.php(60): EditPage->edit()
#10 /var/www/html/includes/actions/SubmitAction.php(38): EditAction->show()
#11 /var/www/html/includes/MediaWiki.php(500): SubmitAction->show()
#12 /var/www/html/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#13 /var/www/html/includes/MediaWiki.php(861): MediaWiki->performRequest()
#14 /var/www/html/includes/MediaWiki.php(524): MediaWiki->main()
#15 /var/www/html/index.php(42): MediaWiki->run()
#16 {main}