Board Thread:Support Requests - Getting Technical/@comment-184.191.152.68-20200912212413/@comment-45117243-20200912233158

It has nothing to do with your Java version.

When does it work last time, and on which page for example?

My assumption is that the wiki admins changed the tooltip code to "custom tooltips" and configured it on the site JS, but since site JS needs to be reviwed and approved by Fandom staff, it's not working meantime. In this case, it should start working again soon.