This is the main page for the Fossil self-hosting repository.
...

If I manually construct link:
http://localhost:8080/taglist

I see what I believe should be seen on Tags page.
It seems to be related to changes in Check-in a12cb216b7

drh added on 2009-01-23 12:58:12:
The default menu does not do this. You are probably using a customized menu which has not been updated.

Go to "Setup" then "Header" then click on the "Revert To Default" button to restore your page header to the default configuration. This will get Tags to point to the right page. Or, manually edit your existing header.

Note that there is now a new item on the menu: "Branches". So if you edit your existing setup rather than using "Revert To Default", you might want to add your own "Branches" entry.