Mailster uses custom rewrite rules to process certain actions and to route users on the newsletter homepage. If you have problems with links this article can help.

Permalinks a permanent URLs to your individual pages. If you don’t have permalinks setup or your server is not able to handle them your page URLs may look something like this:

https://example.com/?p=123

If you have Permalinks enabled URLs look much nicer:

https://example.com/hello-world

Please read more on the official documentation page.

Re-Save Permalinks

The link structure of your page is complex so WordPress caches it to for faster calculation. This mean when the structure changes WordPress has to recalculate the changes.

This can be done by clicking on “Save Changes” on the Permlink page at Settings => Permalink

Save Changes on the Permalink Structure Page

Once your click the button WordPress will recalculate the permalink structure of your site.