[Plugin: Achievements for BuddyPress] URL problem

I’m trying to have the achievements page as a subpage (https://example.com/page/achievements). At first, it seems to work as the achievements directory displays without an issue. However, if you click on an achievement it redirects me to https://example.com/achievements/item which doesn’t display because it suppose to be https://example.com/page/achievements/item. Any help? Thanks!

https://www.ads-software.com/extend/plugins/achievements/