I cannot provide any description, since I have nothing to go on other than the screenshot. I tried a google reverse search, but it came up empty.
Screenshot is taken from here: https://imgur.com/gallery/P9qAH
Does anyone know which game this is? I know it is not Guild Wars 2 as suggested in the comments of that gallery post.
Best Answer
Based on one of the comments on the Imgur page, and then looking at said game, I think it is Archeage. Here is a screenshot I found on Google Images, where the style and UI matches:
https://i.ytimg.com/vi/rlb6A-AEtfw/maxresdefault.jpg