Hi, whenever I click on anything on my forum I get a 404 error from my web host? here is my domain so you can see for yourself http://talkalot.epizy.com/
We've just checked and don't find such an issue. Simply there is no forums or topic created.
Please follow this doc to manage forum: https://wpforo.com/docs/root/categories-and-forums/forum-manager/
Also please note: If a category (blue panels) does not have forums (grey panels) it will not be displayed on front-end. Each category should contain at least one forum.