Guild Wars 2

So yesterday there were a patch or something. And i can’t find the changelog for that patch… Where can i find it? The only recent changelog is for 28th of January.
Reason for searching it is cause we did AC explorer path 1 and it was easy. Then patch came and when we came online again we did the 2nd path, which normally is easier (at least from my own experience) but yesterday it was hard for everyone and none of my party members had never had as much trouble as we did. Neither had I….

https://forum-en.gw2archive.eu/forum/info/news/Game-Update-Notes-January-28-2013/first#post1468295

“We’ve updated the game for routine maintenance only.

No content changes were included."