Recently I gonna do something about the plugins of my confluence(6.1.2), but when I click the button under the general settings to get the UPM page, I got a "page not found" response, can you tell me what's wrong with my situation, thank you!
when I click the button of plugins(插件), I got a page not found response as below:
when I go to the general configuration page, I can't find any items about plugin settings for example the "Atlassian Marketplace":
