Now Wikilog stopped to work for me with MediaWiki 1.28.0. Here is the error message:
2017/01/02 17:33:51 [error] 3546#0: *7104 FastCGI sent in stderr: "PHP message: PHP Fatal error: Call to undefined method SkinVector::link() in /var/www/withoutvowels/web/w/extensions/Wikilog/WikilogItemPager.php on line 192" while reading response header from upstream, client: 31.210.180.196, server: withoutvowels.org, request: "GET /wiki/Blog:Main HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm-withoutvowels.sock:", host: "withoutvowels.org", referrer: "https://withoutvowels.org/wiki/Project:Donate"
Note that I have Vector and only Vector skin installed.
Wikilog 2.0.1.